Question

Keeping the potential difference constant ,the resistance of the circuit is halved .By how much does the current change?

Answer 1

Answer:

You can see the answer in adjoining pic.

Hope it helps...

Answer 2

Explanation:

We know that V1= I1×R1 - - - - - ( 1)

According to the question, v1=v2=V R2=R1/2

V2 =I2 ×R2

=I2×R1/2 ........ (2)

Equation (1)/(2)

V1/V2 = I1 ×R1 /I2×R2

V/V. =I1/I2 ×R1/R1/2

I2 = 2 ×I1