Transformers - Edexcel test questions - Edexcel

1

What is the function of a transformer? - Higher

2

How is a voltage produced on a transformer's secondary coil? - Higher

3

Which type of current makes a transformer work? - Higher

4

Why is a transformer core made from iron? - Higher

5

Which of these is the correct equation for calculating electrical power?

6

Which of these equations correctly links potential differences and number of turns on the coils in transformers? - Higher

7

What kind of transformer converts 230,000 V into 11,500 V?

8

A transformer has 420 turns on its primary coil. How many turns on the secondary coil are needed for it to increase the voltage by a factor of three? - Higher

9

A transformer converts 460 V into 230 V. The power output is 2.3 kW, how much current is drawn into the primary coil?

10

Why do National Grid overhead transmission cables use very high voltages?