Question

Keeping The Potential Difference constant , The resistance of a circuit is doubled .By How much does the current change​

Answer 1

By Using Ohm's law,

We have, V = IR

Here in above equation,

If V is constant, resistance is doubled $R' = 2R$.

Therefore, $V = I'R'$

$V '$ = V since V is constant.

$V = T2R$

Simplifying the above equation in terms of 'T',

$T=\frac{V}{2R} =\frac{I}{2}$

Thus, the current will get reduced to half.