Skip to content

Course home

Sign up

13.2 Transformers and the National Grid

EasyMediumHard
12345678910111213141516171819202122232425262728293031323334353637383940
Question 20

A greenhouse ventilation fan is powered through a transformer with an efficiency of 100%. The fan is connected to the 12 V secondary circuit and runs for 5.0 minutes. During this time, 7.2 kJ of energy is supplied to the primary coil.

What current does the fan draw from the secondary circuit?

[1]
A

2.0 A2.0\ \mathrm{A}2.0 A

B

24 A24\ \mathrm{A}24 A

C

120 A120\ \mathrm{A}120 A

D

0.0020 A0.0020\ \mathrm{A}0.0020 A

Markscheme

13.2 Transformers and the National Grid Questions

  1. GCSE
  2. /Physics
  3. /13.2 Transformers and the National Grid

108 exam-style questions on Edexcel GCSE Physics 13.2 Transformers and the National Grid, covering 13.2.1 Transformers and induction, 13.2.2 The transformer turns-ratio equation, 13.2.3 The National Grid, 13.2.4 The transformer power equation, and 13.2.5 Advantages of high-voltage transmission. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank