Skip to content

Course home

Sign up

4.2.5 Electrical energy and electrical power

EasyMedium
123456789101112131415161718192021222324252627282930313233343536373839
Question 1

A resistor of resistance R R\,R is connected to a power supply that maintains a potential difference V V\,V across it.

There is a current I I\,I in the resistor, and a charge Q Q\,Q passes through it in a time interval ttt.

During this time, the electrical energy transferred to thermal energy in the resistor is EEE.

Which expression is correct?

A

E=I2RtE = I^2 R tE=I2Rt

B

E=V2tIE = \frac{V^2 t}{I}E=IV2t​

C

Q=VRtQ = \frac{V}{R t}Q=RtV​

D

R=VQtR = \frac{V}{Q t}R=QtV​

Markscheme

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.

Question bank