Cambridge IGCSE · Physics

Current electricity

6 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 6 questions

A heater of resistance $110 Ω$ is connected to a $220 V$ supply. What is the power consumed (in W)?
A heater of resistance $120 Ω$ is connected to a $240 V$ supply. What is the power consumed (in W)?
A heater of resistance $44 Ω$ is connected to a $220 V$ supply. What is the power consumed (in W)?
A heater of resistance $6 Ω$ is connected to a $12 V$ supply. What is the power consumed (in W)?
A heater of resistance $55 Ω$ is connected to a $110 V$ supply. What is the power consumed (in W)?
A heater of resistance $12 Ω$ is connected to a $24 V$ supply. What is the power consumed (in W)?

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