Skip to content

Course home

Sign up

4.5.6a Construction and operation of a transformer

EasyMedium
12345678910111213141516171819202122232425262728293031323334353637383940414243
Question 32

A substation uses a step-down transformer to deliver electricity to a local community.

a.

Explain the principle of operation of a simple iron-cored transformer.

[3]
b.

The transformer steps the supply voltage down from 120 000 V120\,000\text{ V}120000 V to 15 000 V15\,000\text{ V}15000 V.

There are 500500500 turns on the secondary coil. Calculate the number of turns on the primary coil.

[2]
c.

The electrical power delivered to the primary coil of the transformer is 48 MW48\text{ MW}48 MW. Calculate the current in the primary coil.

[2]
Markscheme

4.5.6a Construction and operation of a transformer Questions

  1. IGCSE
  2. /Physics
  3. /4.5.6a Construction and operation of a transformer

136 exam-style questions on CIE IGCSE Physics 4.5.6a Construction and operation of a transformer. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank