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] 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] 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]
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] 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] 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] 
From the four circuits shown, in which two 'will the lamps be the same brightness'? 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] 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]
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] 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] 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] 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]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]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] 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]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]
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]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]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]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]
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]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]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]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]
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]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]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]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]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]
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]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]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]
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] 
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] 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] 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] 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] 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] 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] 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] 
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] 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] 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] 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] 
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] 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] 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] 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] 
Which statement is TRUE about mains electricity in the house? [7j-81]Which statement is TRUE about mains electricity in the house? [7j-82]Which statement is TRUE about mains electricity in the house? [7j-83]Which statement is TRUE about mains electricity in the house? [7j-84]
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] 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] 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] 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]
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] 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] 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] 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]If bulb b1 'blows' what happens to the other bulbs? [7j-93]If bulb b2 'blows' what happens to the other bulbs? [7j-94]If bulb b5 'blows' what happens to the other bulbs? [7j-95]
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]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]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]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]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]