KS3 Science-Physics Quiz on "ELECTRICAL CIRCUITS" (based on QCA 7J)

KS3 Science-Physics Quiz on "ELECTRICAL CIRCUITS" (based on QCA 7J)

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Which of the circuit symbols means a 'meter for measuring current'? [7j-1]
1. sym07
2. sym27
3. sym06
4. sym19
Which of the circuit symbols means a 'meter for measuring potential difference'? [7j-2]
1. sym07
2. sym27
3. sym06
4. sym19
Which of the circuit symbols means a 'light bulb or lamp'? [7j-3]
1. sym07
2. sym27
3. sym06
4. sym19
Which of the circuit symbols means 'two cells or batteries in series'? [7j-4]
1. sym10
2. sym14
3. sym18
4. sym11
Which of the circuit symbols means a 'switch 'on''? [7j-5]
1. sym08
2. sym09
3. sym18
4. sym10
Which of the circuit symbols means a 'switch 'off''? [7j-6]
1. sym08
2. sym09
3. sym18
4. sym10
Which of the circuit symbols means a 'switch closed'? [7j-7]
1. sym18
2. sym10
3. sym08
4. sym09
Which of the circuit symbols means a 'switch open'? [7j-8]
1. sym08
2. sym10
3. sym18
4. sym09
Which of the circuit symbols means a 'two way switch'? [7j-9]
1. sym14
2. sym23
3. sym18
4. sym02
Which of the circuit symbols means 'two cells or batteries in parallel'? [7j-10]
1. sym11
2. sym28
3. sym30
4. sym29
Which of the circuit symbols means 'two bulbs or lamps in series'? [7j-11]
1. sym11
2. sym28
3. sym30
4. sym29
Which of the circuit symbols means 'two bulbs or lamps in parallel'? [7j-12]
1. sym11
2. sym28
3. sym30
4. sym29
From the four circuits shown, 'in which two will the bulbs be the same brightness'? Note that the bulbs are identical and the batteries identical. [7j-13]
1. circuit 01 and circuit 05
2. circuit 01 and circuit 04
3. circuit 04 and circuit 05
4. circuit 05 and circuit 07
From the four circuits shown, 'in which will the bulb or bulbs be the dimmest'? Note that the bulbs are identical and the batteries identical. [7j-14]
1. circuit 01
2. circuit 04
3. circuit 05
4. circuit 07
From the four circuits shown, 'in which will the bulb or bulbs be the brightest'? Note that the bulbs are identical and the batteries identical. [7j-15]
1. circuit 01
2. circuit 04
3. circuit 07
4. circuit 05
From the four circuits shown, in which two 'will the lamps be the same brightness'? Note that the bulbs are identical and the batteries identical. [7j-16]
1. circuit 09 and circuit 16
2. circuit 07 and circuit 09
3. circuit 03 and circuit 07
4. circuit 03 and circuit 16
From the four circuits shown, which will have 'the brightest lit lamp or lamps'? Note that the bulbs are identical and the batteries identical. [7j-17]
1. circuit 07
2. circuit 09
3. circuit 03
4. circuit 16
From the four circuits shown, which will have 'the dimmest lit bulb or bulbs'? Note that the bulbs are identical and the batteries identical. [7j-18]
1. circuit 07
2. circuit 09
3. circuit 03
4. circuit 16
From the four circuits shown, in which two 'will the lamps be the same brightness'?
Note that the bulbs are identical and the batteries identical. [7j-19]
1. circuit 04 and circuit 06
2. circuit 06 and circuit 08
3. circuit 04 and circuit 17
4. circuit 08 and cicuit 17
From the four circuits shown, which will have 'the brightest lit bulb or bulbs'? Note that the bulbs are identical and the batteries identical. [7j-20]
1. circuit 08
2. circuit 04
3. circuit 17
4. circuit 06
From the four circuits shown, which will have 'the dimmest lit bulb or bulbs'? Note that the bulbs are identical and the batteries identical. [7j-21]
1. circuit 08
2. circuit 04
3. circuit 17
4. circuit 06
Which words means 'does not readily allow the passage of electricity'? [7j-22]
1. insulator
2. conductor
3. voltmeter
4. ammeter
Which words means 'readily allows the passage of electricity'? [7j-23]
1. insulator
2. conductor
3. voltmeter
4. ammeter
Which words means an 'instrument that measures electrical force'? [7j-24]
1. insulator
2. conductor
3. voltmeter
4. ammeter
Which words means an 'instrument that measures electrical current'? [7j-25]
1. insulator
2. conductor
3. voltmeter
4. ammeter
Which of the following symbols means a 'variable resistor'? [7j-26]
1. sym21
2. sym05
3. sym04
4. sym13
Which of the following symbols means a 'fixed resistor'? [7j-27]
1. sym21
2. sym05
3. sym04
4. sym13
Which of the following symbols means a 'fuse'? [7j-28]
1. sym21
2. sym05
3. sym04
4. sym13
Which of the following is TRUE when comparing the two circuits 11 and 12? Note that the bulbs are identical and the batteries identical. [7j-29]
1. in circuit 11 the bulbs are wired in parallel, but not so in circuit 12
2. if switch s2 is opened in both circuits, all the bulbs go out
3. the bulbs are dimmer in circuit 11 than the bulbs in circuit 12
4. the bulbs are brighter in circuit 12 than the bulbs in circuit 11
Which of the following is TRUE when comparing the two circuits 11 and 12? Note that the bulbs are identical and the batteries identical. [7j-30]
1. if switch s2 is opened in both circuits, all the bulbs go out
2. in circuit 12 the bulbs are wired in series, but not in circuit 11
3. the bulbs are dimmer in circuit 11 than the bulbs in circuit 12
4. the bulbs are brighter in circuit 12 than the bulbs in circuit 11
Which of the following is TRUE when comparing the two circuits 11 and 12? Note that the bulbs are identical and the batteries identical. [7j-31]
1. the bulbs in circuit 11 are wired in series
2. the bulbs in circuit 12 are wired in parallel
3. in circuit 11 the bulbs will be brighter than in circuit 12
4. the bulbs are dimmer in circuit 11 than the bulbs in circuit 12
Which of the following is TRUE when comparing the two circuits 11 and 12? Note that the bulbs are identical and the batteries identical. [7j-32]
1. the bulbs in circuit 11 are wired in series
2. the bulbs in circuit 12 are wired in parallel
3. the bulbs are brighter in circuit 12 than the bulbs in circuit 11
4. in circuit 12 the bulbs will be dimmer than in circuit 11
Which of the following is TRUE when comparing the two circuits 11 and 12? Note that the bulbs are identical and the batteries identical. [7j-33]
1. if switch s2 is opened in both circuits, all the bulbs go out in circuit 12 and only bulb b2 in circuit 11
2. if switch s2 is opened in both circuits, all the bulbs go out in circuit 11 and only bulb b1 in circuit 12
3. if ammeter a3 reads 0.4A in both circuits, ammeter a2 reads 0.4A in circuit 11 and ammeter a2 reads 0.2A in circuit 12
4. if ammeter a3 reads 0.4A in both circuits, ammeter a1 reads 0.4A in circuit 11 and ammeter a1 reads 0.2A in circuit 12
Which of the following is TRUE when comparing the two circuits 11 and 12? Note that the bulbs are identical and the batteries identical. [7j-34]
1. if switch s2 is opened in both circuits, all the bulbs go out in circuit 11 and only bulb b1 in circuit 12
2. if switch s3 is opened in both circuits, all the bulbs go out in both circuits
3. if ammeter a3 reads 0.4A in both circuits, ammeter a2 reads 0.4A in circuit 11 and ammeter a2 reads 0.2A in circuit 12
4. if ammeter a3 reads 0.4A in both circuits, ammeter a1 reads 0.4A in circuit 11 and ammeter a1 reads 0.2A in circuit 12
Which of the following is TRUE when comparing the two circuits 11 and 12? Note that the bulbs are identical and the batteries identical. [7j-35]
1. if switch s2 is opened in both circuits, all the bulbs go out in circuit 11 and only bulb b1 in circuit 12
2. if ammeter a3 reads 0.4A in both circuits, ammeter a2 reads 0.4A in circuit 11 and ammeter a2 reads 0.2A in circuit 12
3. if ammeter a3 reads 0.4A in both circuits, ammeter a2 reads 0.2A in circuit 11 and ammeter a2 reads 0.4A in circuit 12
4. if ammeter a3 reads 0.4A in both circuits, ammeter a1 reads 0.4A in circuit 11 and ammeter a1 reads 0.2A in circuit 12
Which of the following is TRUE when comparing the two circuits 11 and 12? Note that the bulbs are identical and the batteries identical. [7j-36]
1. if switch s2 is opened in both circuits, all the bulbs go out in circuit 11 and only bulb b1 in circuit 12
2. if ammeter a3 reads 0.4A in both circuits, ammeter a2 reads 0.4A in circuit 11 and ammeter a2 reads 0.2A in circuit 12
3. if ammeter a3 reads 0.4A in both circuits, ammeter a1 reads 0.4A in circuit 11 and ammeter a1 reads 0.2A in circuit 12
4. if ammeter a3 reads 0.4A in both circuits, ammeter a1 reads 0.2A in circuit 11 and ammeter a1 reads 0.4A in circuit 12
Which of the following is a unit of electrical force shown on a battery? [7j-37]
1. volts
2. amps
3. joules
4. series
Which of the following is a unit of current? [7j-38]
1. volts
2. amps
3. joules
4. series
Which of the following is a unit of energy? [7j-39]
1. volts
2. amps
3. joules
4. series
Which of the following is a unit of fuse rating? [7j-40]
1. volts
2. coulombs
3. joules
4. amps
Circuit 18 shows how three lamps and four ammeters are wired together. All the lamps are identical and all four switches are closed. If ammeter a4 reads 12A, what will be the current reading on ammeter a2? [7j-41]
1. 4A
2. 8A
3. 12A
4. 3A
Circuit 18 shows how three lamps and four ammeters are wired together. All the lamps are identical and all four switches are closed. If ammeter a1 reads 3A, what will be the current reading on ammeter a4? [7j-42]
1. 3A
2. 9A
3. 6A
4. 1A
Circuit 18 shows how three lamps and four ammeters are wired together. The lamps are NOT identical but all four switches are closed. If ammeter a4 reads 8A, a1 reads 3A and a2 reads 2A, what will be the current reading on ammeter a3? [7j-43]
1. 1A
2. 2A
3. 3A
4. 4A
Circuit 18 shows how three lamps and four ammeters are wired together. The lamps are NOT identical but all four switches are closed. If ammeter a1 reads 2A, a2 reads 1A and a3 reads 4A, what will be the current reading on ammeter a4? [7j-44]
1. 4A
2. 6A
3. 5A
4. 7A
Which statement about electricity and circuits is TRUE? [7j-45]
1. the conventional current flows from + to -
2. the circuit does not have to be complete for a current to flow
3. to be effective cells must be connected + to + and - to -
4. more bulbs wired in series decreases the total resistance
Which statement about electricity and circuits is TRUE? [7j-46]
1. the conventional current flows from + to +
2. the circuit must be complete for a current to flow
3. to be effective cells must be connected + to + and - to -
4. more bulbs wired in series decreases the total resistance
Which statement about electricity and circuits is TRUE? [7j-47]
1. the conventional current flows from - to -
2. the circuit does not have to be complete for a current to flow
3. to be effective cells must be connected + to -
4. more bulbs wired in series decreases the total resistance
Which statement about electricity and circuits is TRUE? [7j-48]
1. the conventional current flows from - to +
2. the circuit does not have to be complete for a current to flow
3. to be effective cells must be connected + to + and - to -
4. more bulbs wired in series increases the total resistance
Which statement about electricity and circuits is TRUE? [7j-49]
1. a battery or cell is a supply of electrical energy
2. bulbs wired in parallel increase the total resistance
3. for a current to flow a switch must be open
4. electrical current is a flow of positive protons
Which statement about electricity and circuits is TRUE? [7j-50]
1. a battery or cell is a supply of chemical energy
2. bulbs wired in parallel decrease the total resistance
3. for a current to flow a switch must be open
4. electrical current is a flow of positive protons
Which statement about electricity and circuits is TRUE? [7j-51]
1. a battery or cell is a supply of heat energy
2. bulbs wired in parallel increase the total resistance
3. for a current to flow a switch must be closed
4. electrical current is a flow of positive protons
Which statement about electricity and circuits is TRUE? [7j-52]
1. a battery or cell is a supply of kinetic energy
2. bulbs wired in parallel increase the total resistance
3. for a current to flow a switch must be open
4. electrical current is a flow of negative electrons
Circuit 19 shows a switch closed, battery, bulb and a variable resistor wired in a complete series circuit. Which statement about the operation of the circuit is TRUE? [7j-53]
1. if the resistance is decreased, more current flows and the bulb is brighter
2. if the resistance is increased less current flows and the bulb cannot light up
3. if the cell or battery connections are swapped around, the bulb goes out
4. the variable resistor cannot be used as a switch
Circuit 19 shows a switch closed, battery, bulb and a variable resistor wired in a complete series circuit. Which statement about the operation of the circuit is TRUE? [7j-54]
1. if the resistance is decreased, less current flows and the bulb is brighter
2. if the resistance is increased less current flows and the bulb is dimmer
3. if the cell or battery connections are swapped around, the bulb goes out
4. the variable resistor cannot be used as a switch
Circuit 19 shows a switch closed, battery, bulb and a variable resistor wired in a complete series circuit. Which statement about the operation of the circuit is TRUE? [7j-55]
1. if the resistance is decreased, less current flows and the bulb is dimmer
2. if the resistance is increased more current flows and the bulb burns out
3. if the cell or battery connections are swapped around, the bulb still lights
4. the variable resistor cannot be used as a switch
Circuit 19 shows a switch closed, battery, bulb and a variable resistor wired in a complete series circuit. Which statement about the operation of the circuit is TRUE? [7j-56]
1. if the resistance is decreased, less current flows and the bulb is brighter
2. if the resistance is increased more current flows and the bulb burns out
3. if the cell or battery connections are swapped around, the bulb goes out
4. the variable resistor can be used as a switch
Circuit 20 shows a circuit arrangement for six switches (s) and six bulbs (b). Which bulbs light up if switch s5 is closed? [7j-57]
1. b1 only
2. b1 and b6
3. b1, b2, b3 and b6
4. b1, b5 and b6
Circuit 20 shows a circuit arrangement for six switches (s) and six bulbs (b). Which bulbs light up if switches s1, s3 and s5 are closed? [7j-58]
1. b1, b2 and b5
2. b1, b2, b3 and b6
3. b1, b2, b4 and b6
4. b1, b2, b4, b5 and b6
Circuit 20 shows a circuit arrangement for six switches (s) and six bulbs (b). Which bulbs light up if switches s1, s2 and s5 are closed? [7j-59]
1. b1, b2, b5 and b6
2. b1, b2, b3 and b6
3. b1, b2, b4 and b6
4. b1, b2, b4, b5 and b6
Circuit 20 shows a circuit arrangement for six switches (s) and six bulbs (b). Which bulbs light up if switches s1, s2, s4 and s5 are closed? [7j-60]
1. b1, b2, b5 and b6
2. b1, b2, b3 and b6
3. b1, b2, b4 and b6
4. b1, b2, b4, b5 and b6
Circuit 20 shows a circuit arrangement for six switches (s) and six bulbs (b). Which bulbs light up if switches s1, s3, s4 and s5 are closed? [7j-61]
1. b1, b2, b3, b5 and b6
2. b1, b2, b3 and b6
3. b1, b2, b4 and b6
4. b1, b2, b4, b5 and b6
Circuit 21 shows the arrangement of six identical bulbs (X) and four ammeters (a1 to a4). To solve the problem you need to realise that each bulb has an identical resistance. The more bulbs there are in series, the greater the resistance to current flow. If a1 reads 3A and a4 reads 5.5A what will ammeter a2 read? [7j-62]
1. 1.0A
2. 1.5A
3. 2.0A
4. 0.5A
Circuit 21 shows the arrangement of six identical bulbs (X) and four ammeters (a1 to a4). To solve the problem you need to realise that each bulb has an identical resistance. The more bulbs there are in series, the greater the resistance to current flow. If a1 reads 6A and a2 reads 3A what will ammeter a4 read? [7j-63]
1. 12A
2. 10A
3. 11A
4. 9A
Circuit 21 shows the arrangement of six identical bulbs (X) and four ammeters (a1 to a4). To solve the problem you need to realise that each bulb has an identical resistance. The more bulbs there are in series, the greater the resistance to current flow. If a2 reads 4.5A and a3 reads 3.0A what will ammeter a1 read? [7j-64]
1. 6.0A
2. 7.5A
3. 1.5A
4. 9.0A
The ratings for four typical domestic appliance fuses are given below. Which is the safest fuse to use for an appliance with a normal operating current of 2A? [7j-65]
1. 3A
2. 5A
3. 8A
4. 13A
The ratings for four typical domestic appliance fuses are given below. Which is the safest fuse to use for an appliance with a normal operating current of 3A? [7j-66]
1. 3A
2. 5A
3. 8A
4. 13A
The ratings for four typical domestic appliance fuses are given below. Which is the safest fuse to use for an appliance with a normal operating current of 6A? [7j-67]
1. 3A
2. 5A
3. 8A
4. 13A
The ratings for four typical domestic appliance fuses are given below. Which is the safest fuse to use for an appliance with a normal operating current of 10A? [7j-68]
1. 3A
2. 5A
3. 8A
4. 13A
The ratings for four typical domestic appliance fuses are 3A, 5A, 8A and 13A. Which fuse wires will melt if a current of 4A is passed through them? [7j-69]
1. 3A only
2. 3A and 5A only
3. 3A, 5A and 8A only
4. 3A, 5A, 8A and 13A
The ratings for four typical domestic appliance fuses are 3A, 5A, 8A and 13A. Which fuse wires will melt if a current of 6A is passed through them? [7j-70]
1. 3A only
2. 3A and 5A only
3. 3A, 5A and 8A only
4. 3A, 5A, 8A and 13A
The ratings for four typical domestic appliance fuses are 3A, 5A, 8A and 13A. Which fuse wires will melt if a current of 9A is passed through them? [7j-71]
1. 3A only
2. 3A and 5A only
3. 3A, 5A and 8A only
4. 3A, 5A, 8A and 13A
The ratings for four typical domestic appliance fuses are 3A, 5A, 8A and 13A. Which fuse wires will melt if a current of 14A is passed through them? [7j-72]
1. 3A only
2. 3A and 5A only
3. 3A, 5A and 8A only
4. 3A, 5A, 8A and 13A
The Circuit 22 shows two, two way switches, s1 and s2, connected to a power supply and lamp. Which conditions ensure the lamp is ON in Circuit 22? [7j-73]
1. s1a closed (up) and s2b open (up)
2. s1b open (up) and s2a open (down)
3. s1a open (down) and s2a closed (up)
4. s1b closed (down) and s2b open (up)
The Circuit 22 shows two, two way switches, s1 and s2, connected to a power supply and lamp. Which conditions ensure the lamp is OFF in Circuit 22? [7j-74]
1. s1a closed (up) and s2b open (up)
2. s1b open (up) and s2a open (down)
3. s1b open (up) and s2a closed (up)
4. s1a open (down) and s2b closed (down)
The Circuit 22 shows two, two way switches, s1 and s2, connected to a power supply and lamp. Which conditions ensure the lamp is OFF in Circuit 22? [7j-75]
1. s1b closed (down) and s2a open (down)
2. s1b open (up) and s2a closed (up)
3. s1a open (down) and s2a closed (up)
4. s1a open (down) and s2b closed (down)
The Circuit 22 shows two, two way switches, s1 and s2, connected to a power supply and lamp. Which conditions ensure the lamp is ON in Circuit 22? [7j-76]
1. s1a closed (up) and s2a open (down)
2. s1a closed (up) and s2b closed (down)
3. s1a open (down) and s2a closed (up)
4. s1a open (down) and s2b closed (down)
The Circuit 23 shows a two way switch s1 and a simple switch s2, connected to a power supply and five lamps (b1 to b5). Which lamps will be ON when only switch s1a is closed (up)? [7j-77]
1. b2 and b3
2. b1 and b4
3. b1, b2, b3 and b5
4. b1, b2, b4 and b5
The Circuit 23 shows a two way switch s1 and a simple switch s2, connected to a power supply and five lamps (b1 to b5). Which lamps will be ON when only switch s1b is closed (down)? [7j-78]
1. b2 and b3
2. b1 and b4
3. b1, b2, b3 and b5
4. b1, b2, b4 and b5
The Circuit 23 shows a two way switch s1 and a simple switch s2, connected to a power supply and five lamps (b1 to b5). Which lamps will be ON when switches s1a and s2 are closed? [7j-79]
1. b2 and b3
2. b1 and b4
3. b1, b2, b3 and b5
4. b1, b2, b4 and b5
The Circuit 23 shows a two way switch s1 and a simple switch s2, connected to a power supply and five lamps (b1 to b5). Which lamps will be ON when switches s1b and s2 are closed? [7j-80]
1. b2 and b3
2. b1 and b4
3. b1, b2, b3 and b5
4. b1, b2, b4 and b5
Which statement is TRUE about mains electricity in the house? [7j-81]
1. the voltage is much bigger than a battery
2. wet skin has a bigger resistance than dry skin
3. the current flow is usually similar to triple batteries in a torch
4. a fuse allows a much higher than normal current to flow safely
Which statement is TRUE about mains electricity in the house? [7j-82]
1. the voltage is a little bigger than a battery
2. wet skin has a lower resistance than dry skin
3. the current flow is usually similar to triple batteries in a torch
4. a fuse allows a much higher than normal current to flow safely
Which statement is TRUE about mains electricity in the house? [7j-83]
1. the voltage is a little bigger than a battery
2. wet skin has a bigger resistance than dry skin
3. the current flow is usually big compared to a torch battery
4. a fuse allows a much higher than normal current to flow safely
Which statement is TRUE about mains electricity in the house? [7j-84]
1. the voltage is a little bigger than a battery
2. wet skin has a bigger resistance than dry skin
3. the current flow is usually similar to triple batteries in a torch
4. a fuse should melts if a significantly higher than normal current flows
The five circuits show various arrangements of identical cells and identical batteries. If the ammeter reading in circuit 02 is 0.3A, in which circuit will the ammeter reading be 0.6A? [7j-85]
1. circuit 03
2. circuit 04
3. circuit 07
4. circuit 08
The five circuits show various arrangements of identical cells and identical batteries. If the ammeter reading in circuit 02 is 0.3A, in which circuit will the ammeter reading be 0.15A? [7j-86]
1. circuit 03
2. circuit 04
3. circuit 07
4. circuit 08
The five circuits show various arrangements of identical cells and identical batteries. If the ammeter reading in circuit 02 is 0.3A, in which circuit will the ammeter reading be 0.9A? [7j-87]
1. circuit 03
2. circuit 04
3. circuit 07
4. circuit 08
The five circuits show various arrangements of identical cells and identical batteries. If the ammeter reading in circuit 02 is 0.3A, in which circuit will the ammeter reading be 0.1A? [7j-88]
1. circuit 03
2. circuit 04
3. circuit 07
4. circuit 08
In circuit 24 two cells, 2 bulbs and a switch are wired in series. An extra wire has been added to the similar circuits 25, 26 and 27. In which circuit will bulbs b1 and b2 light up when the switch s is closed is closed? [7j-89]
1. circuit 24
2. circuit 25
3. circuit 26
4. circuit 27
In circuit 24 two cells, 2 bulbs and a switch are wired in series. An extra wire has been added to the similar circuits 25, 26 and 27. In which circuit will only bulb b2 light up and only if switch s is closed? [7j-90]
1. circuit 24
2. circuit 25
3. circuit 26
4. circuit 27
In circuit 24 two cells, 2 bulbs and a switch are wired in series. An extra wire has been added to the similar circuits 25, 26 and 27. In which circuit will only bulb b2 light up but does not need switch s to be closed? [7j-91]
1. circuit 24
2. circuit 25
3. circuit 26
4. circuit 27
In circuit 24 two cells, 2 bulbs and a switch are wired in series. An extra wire has been added to the similar circuits 25, 26 and 27. In which circuit will only bulb b1 light up when the switch s is closed? [7j-92]
1. circuit 24
2. circuit 25
3. circuit 26
4. circuit 27
If bulb b1 'blows' what happens to the other bulbs? [7j-93]
1. b2, b3, b4, b5 and b6 all stay lit
2. b2 and b3 stay lit but b4, b5 and b6 also go out
3. b4, b5 and b6 stay lit, but b2 and b3 also go out
4. b2, b3, b4, b5 and b6 also go out
If bulb b2 'blows' what happens to the other bulbs? [7j-94]
1. b1, b3, b4, b5 and b6 stay lit
2. b1, b4, b5 and b6 stay lit, but b3 also goes out
3. b4, b5 and b6 stay lit, but b1 and b3 also go out
4. b1, b3, b4, b5 and b6 also go out
If bulb b5 'blows' what happens to the other bulbs? [7j-95]
1. b1, b2, b3, b4 and b6 stay lit
2. b1, b2, b3 and b6 stay lit, but b4 also goes out
3. b1, b2 and b3 stay lit but b4 and b6 also go out
4. b1, b2, b3, b4 and b6 also go out
In the circuit 20 shown above, all the bulbs light up when all the switches are closed. What happens to the other bulbs if bulb b2 'blows'? [7j-96]
1. b4 and b5 go out, b1, b3 and b6 stay lit
2. b1, b3 and b6 go out, b4 and b5 stay lit
3. b1, b5 and b6 stay lit, b3 and b4 go out
4. b1 still lit, b3, b4, b5 and b6 go out
In the circuit 20 shown above, all the bulbs light up when all the switches are closed. What happens to the other bulbs if bulb b3 'blows'? [7j-97]
1. b6 goes out, b1, b2, b4 and b5 stay lit
2. b2 and b6 go out, b1, b4 and b5 stay lit
3. b4 and b5 go out, b1, b2 and b6 stay lit
4. b2 goes out, b1, b4, b5 and b6 stay lit
In the circuit 20 shown above, all the bulbs light up when all the switches are closed. What happens to the other bulbs if bulb b4 'blows'? [7j-98]
1. b5 and b6 go out, b1, b2 and b3 stay lit
2. b5 goes out, b1, b2, b3 and b6 stay lit
3. b1 and b5 go out, b2, b3 and b6 stay lit
4. b3, b5 and b6 go out, b1 and b2 stay lit
In the circuit 20 shown above, all the bulbs light up when all the switches are closed. What happens to the other bulbs if bulb b5 'blows'? [7j-99]
1. b3 goes out, b1, b2, b4 and b6 stay lit
2. b2 and b4 go out, b1 and b6 stay lit
3. b4 goes out, b1, b2, b3 and b6 stay lit
4. b3 and b6 go out, b1, b2 and b4 stay lit
In the circuit 20 shown above, all the bulbs light up when all the switches are closed. What happens to the other bulbs if bulb b6 'blows'? [7j-100]
1. b4 goes out, b1, b2, b3 and b5 stay lit
2. b3 and b5 go out, b1, b2 and b4 stay lit
3. b4 and b5 go out, b1, b2 and b3 stay lit
4. b3 goes out, b1, b2, b4 and b5 stay lit

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