Question 24
[Maximum number: 1]
What is the unit of potential difference (p.d.)?
A
ampere
B
coulomb
C
coulomb / second
D
volt
IGCSE Physics 4.2.3 Electromotive force and potential difference Question Bank
4.2.3 Electromotive force and potential difference
Question 26
[Maximum number: 1]
Which unit is used to measure electromotive force (e.m.f.)?
A
ampere
B
joule
C
volt
D
watt
Question 26
[Maximum number: 1]
Which statement about a voltmeter is correct?
A
It has a scale which is marked in amperes (A).
B
It must be connected in series in a circuit.
C
It measures potential difference (p.d.).
D
It must have three terminals.
Question 27
[Maximum number: 1]
A resistor transfers 100 J of energy when a charge of 10 C flows through it.
What is the potential difference across the resistor?
A
0.10 V
B
10 V
C
10 W
D
1000 W
Question 27
[Maximum number: 1]
A battery is connected to a circuit. It is switched on for 1.0 minute. During that time, there is a current of 0.40 A in the circuit and the battery supplies a total of 48 J of energy.
Which row gives the charge that passes and the electromotive force (e.m.f.) of the battery?
charge that passes
in 1.0 minute / C
e.m.f. of the
battery / V
0.40
2.0
0.40
120
24
2.0
24
120
Question 27
[Maximum number: 1]
Two power supplies are connected in separate circuits. Both power supplies provide the same magnitude current.
Power supply P has an electromotive force (e.m.f.) of 1.5 V and power supply Q has an e.m.f. of 3.0 V.
Which statements are correct?
1 Source Q supplies twice the charge per unit time.
2 Source Q supplies twice the energy per unit charge.
3 Source Q supplies twice the energy per unit time.
A
1, 2 and 3
B
1 and 2 only
C
1 and 3 only
D
2 and 3 only
Question 27
[Maximum number: 1]
The electromotive force (e.m.f.) of a rechargeable battery is 6.0 V .
What does this mean?
A
6.0 J is the maximum energy the battery can provide in 1.0 s .
B
6.0 J is the total energy the battery can provide before it has to be recharged.
C
6.0 J of energy is provided by the battery to drive a charge of 1.0 C around a complete circuit.
D
6.0 J of energy is provided by the battery to drive a current of 1.0 A around a complete circuit.
Question 27
[Maximum number: 1]
What is the electromotive force (e.m.f.) of a cell?
A
the amount of charge that passes through the cell per unit time
B
the energy gained per unit charge as charge passes through the cell
C
the total amount of charge flowing through the cell
D
the total energy stored in the cell
Question 28
[Maximum number: 1]
A cell has an electromotive force (e.m.f.) of 1.5 V .
What does this statement mean?
A
The cell converts 1.0 J of energy when driving 1.5 C of charge round a complete circuit.
B
The cell converts 1.5 J of energy when driving 1.0 C of charge round a complete circuit.
C
The cell converts 1.5 J of energy per second when driving 1.0 C of charge round a complete circuit.
D
The cell converts 1.5 W of power when driving 1.0 C of charge round a complete circuit.
Question 28
[Maximum number: 1]
Two separate circuits have different power supplies. Both power supplies provide the same magnitude current.
Power supply P has an electromotive force (e.m.f.) of 1.5 V and power supply Q has an e.m.f. of 3.0 V.
Which statements about Q are correct when compared with P ?
1Q supplies twice the charge per unit time.
2Q supplies twice the energy per unit charge.
3Q supplies twice the energy per unit time.
A
1, 2 and 3
B
1 and 2 only
C
1 and 3 only
D
2 and 3 only
0 selected