Transformers

Question

summarize Faraday’s experiment. What did he observe?


a) When the switch is first closed?

b) When the switch remains closed?

c) When the switch is opened?

d) When the switch remains open?

 

I'm trying to understand this questions, can someone help me 

Answer 1

This is the principle of transformer

 

1 When the switch of primary is just closed a current of short duration flows in the secondary

2.When switch remains closed no current in secondary

3.When switch is opened a current in secondary flows in opposite direction , if compared to previous current

4.When switch is kept open then no current as no mutual induction occurs ( Magnetic flux must change for induced current)