GCSE Physics – Electric Circuits – Exam Style Questions with Answers

The resistance of P is 3.5 Ω. Calculate the resistance of Q.

Resistance of Q = ______________________ Ω     (1)

Calculate the charge that flows through the thermistor in 5 minutes when the current is 3.5 mA.   Charge = ________________ C          (3)

The equation which links current, potential difference and power is:

power = current × potential difference

Calculate the power output of the battery in the figure above.

Give your answer to one significant figure.

Power = _____________________ W   (2)

There is a potential difference of 3.6 V across the lamp in Figure 3. The current through the lamp is 0.80 A . Calculate the resistance of the lamp.

The current in the circuit is 3.5 mA when the potential difference across the thermistor is 4.2 V . Calculate the resistance of the thermistor.

Resistance = ____________________ Ω         (3)

The student connects the two resistors in the diagram above in parallel.

What happens to the total resistance of the circuit?

Total resistance = _______________________ Ω    (2)

The equation which links current, potential difference and resistance is:

potential difference = current × resistance

Calculate the potential difference across the battery in the circuit in the figure above.

Potential difference = _____________________ V        (3)

The current in the circuit is direct current.

What is meant by direct current?

How does the total resistance of Circuit Y compare with the total resistance of Circuit X?