Question

magnetic flux through a circuit of resistance 20 ohm is changed from 20wb to 40wb in 5 milliseconds. charge pass through the circute during this time is?
1. 1C 2. 2C. 3.zero 4. 0.5C​

Answer 1

Answer:

1C

Explanation:

Solution:- (A) 1C

Given:-

Resistance of circuit (R)=20Ω

Time (t)=5×10

−3

sec

As we know that, emf is given as-

e=

dt

dϕ

=

5×10

−3

40−20

=4×10

3

V

Therefore,

Current passing through the circuit is-

I=

R

e

=

20

4×10

3

=2×10

2

A

Now, as we know that,

q=I×t=200×5×10

−3

=1C

Hence the charge passed through the circuit during the given time is 1C.