What is the device (meter) to measure electric potential difference called?
What will happen to the resistance of the circuit, if the current through it is doubled ?
Define electric current and state its $SI$ unit. With the help of $Ohm's$ law explain the meaning of $1$ ohm resistance
In an electrical circuit two resistors of $2\,\Omega $ and $4\,\Omega $ respectively are connected in series to a $6\, V$ battery. The heat dissipated by the $4\,\Omega $ resistor in $5\, s$ will be ........ $J$
Calculate the number of electrons that would flow per second through the cross$-$section of a wire when $1 \,A$ current flows in it.