Question

# If the resistance of a circuit is halved and the potential difference is kept constant, then the current will become

A
4 times
B
8 times
C
double
D
half

Solution

## The correct option is C doubleAnswer is C.According to Ohm's law, V = IR. That is, I = V/R.Now, if the resistance is halved and the voltage remains the same, the new value of current becomes, $$I'=\dfrac { V }{ \dfrac { R }{ 2 } } =\dfrac { 2V }{ R } .\quad That\quad is,\quad I'=2(\dfrac { V }{ R } )=2I$$.Hence, the current will become double.Physics

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