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4.2.5 Electrical energy and electrical power

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Question 36

An electrical component of resistance R R\,R is connected in a circuit. There is a potential difference V V\,V across the component, resulting in a current III. In a time interval ttt, a charge Q Q\,Q flows through the component and an electrical energy W W\,W is dissipated.

Which expression is correct?

A

Q=VItQ = V I tQ=VIt

B

W=I2RtW = I^2 R tW=I2Rt

C

W=V2RtW = \frac{V^2}{R t}W=RtV2​

D

Q=ItQ = \frac{I}{t}Q=tI​

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4.2.5 Electrical energy and electrical power Questions

  1. IGCSE
  2. /Physics
  3. /4.2.5 Electrical energy and electrical power

69 exam-style questions on CIE IGCSE Physics 4.2.5 Electrical energy and electrical power. Each one has a worked solution and a mark scheme showing where the marks go.

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