Transformers

Question 1

Will a transformer work with a DC current?

Answer 1

No

Question 2

Explain your previous answer.

Answer 2

There is no relative movement.

Question 3

List 2 types of transformer construction?

Answer 3

Shell and core

Question 4

What is the principle purpose of a transformer?

Answer 4

Supply voltage to be stepped-up with a proportional decrease in the current to be transmitted.

Question 5

What is the purpose of the laminated soft iron core?

Answer 5

To achieve the maximum transfer between primary and secondary windings

Question 6

If there are more coils in the secondary windings, what type of transformer is it and what will happen to the output voltage?

Answer 6

It’s a step-up transformer, so the out pout voltage will be higher than the input voltage.

Question 7

State the output voltage equation

Answer 7

output =# of secondary/# of primary x input voltage

Question 8

What is the purpose of a centre tapped transformer?

Answer 8

To effectively reduces the electric shock hazard by halving the voltage. A centre trapped is use in sockets supplying power to portable electrical equipment.

Question 9

Identify the input and output cables on HM Ships?

Answer 9

Red, yellow, blue