A current of 30 A flows in a circuit for 2 minutes.

How much charge passes?

1.   ?    0.066 C
2.   ?    15 C
3.   ?    60 C
4.   ?    3 600 C

The voltage-current graphs for four electrical devices are shown.

1.   ?    A
2.   ?    B
3.   ?    C
4.   ?    D

The resistance of a length of wire is R ohm.

What is the resistance of a wire of the same material and length, but with half the cross-sectional area?

1.   ?    R/4 ohm
2.   ?    R/2 ohm
3.   ?    R ohm
4.   ?    2R ohm

An electrical quantity is defined by "the energy converted by a source in driving unit charge round a complete circuit."

What is this quantity called?

1.   ?    Current
2.   ?    Electromotive Force
3.   ?    Potential Difference
4.   ?    Power

50 J of energy is dissipated for every 10 C of charge passing through a resistor.

Which instrument would allow this to be measured?

1.   ?    An ammeter in series with the resistor.
2.   ?    An ammeter in parallel with the resistor.
3.   ?    A voltmeter in series with the resistor.
4.   ?    A voltmeter in parallel with the resistor.

The diagram shows an electric circuit which two readings are obtained when a suitable power supply is connected to X and Y?

1.   ?    Voltmeter reading: 2 V; Ammeter reading: 6 A
2.   ?    Voltmeter reading: 6 V; Ammeter reading: 0.5 A
3.   ?    Voltmeter reading: 12 V; Ammeter reading: 0.5 A
4.   ?    Voltmeter reading: 12 V; Ammeter reading: 2 A

The graph shows the result of an experiment to determine the resistance of a wire.

1.   ?    0.2 ohm
2.   ?    4.0 ohms
3.   ?    5.0 ohms
4.   ?    80 ohms

A current of 2 A is flowing through a conductor.

How long does it take for 10 C of charge to pass at any point?

1.   ?    0.2 s
2.   ?    5 s
3.   ?    12 s
4.   ?    20 s

A lightning flash carries 25 C charge and lasts for 0.01 s.

What is the current?

1.   ?    0.000 4 A
2.   ?    0.25 A
3.   ?    25 A
4.   ?    2 500 A

A current of 10 A flows through an electric heater for 5 min.

What is the total charge circulated through the heater?

1.   ?    0.5 C
2.   ?    2 C
3.   ?    50 C
4.   ?    3000 C

What is the current in a 5 ohm resistor when the potential difference between the ends of the resistor is 2.5 V?

1.   ?    0.5 A
2.   ?    2.0 A
3.   ?    2.5 A
4.   ?    12.5 A

Which quantity can be measured in units of joule/coulomb?

1.   ?    Charge
2.   ?    Current
3.   ?    Potential Difference
4.   ?    Power

An ammeter is connected in the simple circuit as shown.

1.   ?    5 mA
2.   ?    20 mA
3.   ?    0.2 A
4.   ?    5 A

The diagram shows an ammeter.

1.   ?    0.67 A
2.   ?    0.72 A
3.   ?    0.74 A
4.   ?    6.70 A

In an electrical circuit, a charge of 60 C (coulombs) flows past a point in 10 s.

What is the current in the circuit?

1.   ?    0.17 A
2.   ?    0.6 A
3.   ?    6.0 A
4.   ?    10.0 A

A current of 10 A flows through an electric heater for 10 min.

What is the total charge circulated through the heater?

1.   ?    1 C
2.   ?    60 C
3.   ?    100 C
4.   ?    6 000 C

What is the current in a 5 ohm resistor when the potential difference between the ends of the resistor is 2.5 V?

1.   ?    0.5 A
2.   ?    2.0 A
3.   ?    2.5 A
4.   ?    7.5 A

The circuit shown is used to measure the resistance of resistor R.

1.   ?    A
2.   ?    B
3.   ?    C
4.   ?    D

Which diagram shows a circuit that could be used to vary the brightness of a lamp?

1.   ?    
2.   ?    
3.   ?    
4.   ?