Question

The electric current in a circuit varies from + 2 A
to - 2 A in a time interval of 10-? A s. Another coil
of resistance 2092 and inductance 2 H is placed
near it. What will be the induced current in the
second coil ?
3.​

Answer 1

Answer:

using Faraday's law  

The magnitude of emf induced ε=l  

△t

△I

​  

 

so the current in the coil =  

R

ε

​  

=  

R

L

​  

 

△t

△I

​  

 

△I=2−(−2)=4A,△t=10  

−2

s,L=2H and R=20Ω

I  

induced

​  

=  

20

2  ×  10  −2

 

4

​  

=40A

Explanation: