Skip to content

Course home

Sign up

10.3 Electrical energy and power

EasyMediumHard
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748
Question 36
H

A cable dissipates power PPP. Its current is reduced to half its original value and its resistance is reduced to one-quarter of its original value. What is the new power dissipated?

[1]
A

P8\frac{P}{8}8P​

B

P4\frac{P}{4}4P​

C

P2\frac{P}{2}2P​

D

P16\frac{P}{16}16P​

Markscheme

10.3 Electrical energy and power Questions

  1. GCSE
  2. /Physics
  3. /10.3 Electrical energy and power

105 exam-style questions on Edexcel GCSE Physics 10.3 Electrical energy and power, covering 10.3.1 The heating effect of an electric current, 10.3.2 Reducing energy transfer in wires, 10.3.3 Advantages and disadvantages of the heating effect, 10.3.4 Energy transferred by an electrical circuit, 10.3.5 Electrical power, and 10.3.6 Energy transfers in domestic devices. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank