What is the $SI$ unit of electric potential ?
If the current $I $ through a resistor is increased by $100\%$ (assume that temperature remains unchanged), the increase in power dissipated will be ........ $\%$
Out of the two wires $X$ and $Y$ shown below which one has greater resistance. Justify your answer.
An electron in a metal is free to move anywhere but cannot leave the metal.
$Ohm's$ law is a relation between the power used in a circuit to the current and the potential difference.