# GCSE Revision Quiz: Transformers

## Age: 14-16 Year Olds

### Question 1

Will a transformer work with direct current (d.c.) or alternating current (a.c.)?

### Question 2

What is meant by a step down transformer?

### Question 3

In which of the following would you not expect to find a step down transformer?

### Question 4

A transformer has 1000 windings on the primary coil and 2000 windings on the secondary coils. If the input voltage is 12v a.c., what is the output voltage?

### Question 5

A transformer has 2000 windings on the primary coil and 1000 windings on the secondary coils. If the input voltage is 12v a.c., what is the output voltage?

### Question 6

A transformer has an input voltage of 240v a.c. and output voltage of 12v a.c.. If it has 5,000 turns in the primary coil how many turns does it have in the secondary coil?

### Question 7

In a step up transformer which coil is made of the thinner wire since the current in it will be less?

### Question 8

A transformer has an input voltage of 240v a.c. and output voltage of 12v a.c.. If the secondary current is 2A, what is the primary current?

### Question 9

A transformer has 100 windings on the primary coil and 2000 windings on the secondary coils. If the primary current is 1A, what is the secondary current?

### Question 10

Why is the core of a transformer made of thin metal strips called laminations. 