Question

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

Answer 1

Explanation:

As from Ohm's Law,

V = IR........1

Now, here V is constant.

Let , new resistance R' = 2R and assume that current flow be I'

So, from 1,

IR = I'.R',

-> IR = I'.2R,

Therefore, I' = I / 2

so current is halved