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4.2.5 Electrical energy and electrical power

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Question 22

A homeowner accidentally leaves a 60 W floor lamp switched on when going to bed at 10:30 p.m. (22:30) one night. They do not discover this until they turn it off at 6:30 a.m. (06:30) the next morning.

The mains electricity supply is 240 V.

a.

Calculate how much energy was wasted by the lamp.

[3]
b.

Calculate the electric charge that passed through the lamp during this time.

[3]
c.

What happened to the energy wasted by the lamp?

[1]
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.

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