For driving a current of $2\, A$ for $6$ minutes in a circuit, $1000\, J$ of work is to be done. The $e.m.f.$ of the source in the circuit is ................ $V$
$1.38$
$1.68$
$2.04$
$3.10$
When three identical bulbs of $60 \;W, 200\;V$ rating are connected in series to a $200 \;V$ supply, the power drawn by them will be ....... $Watt$
A resistor ${R_1}$ dissipates the power $P$ when connected to a certain generator. If the resistor ${R_2}$ is put in series with ${R_1}$, the power dissipated by ${R_1}$
Find the power of the circuit ............ $W$
Two light bulbs in the circuit have rating $A\,[24\ V, 48\,W]$ and $B\,[24\ V, 36\,W]$ as shown.
Two wires with resistances $R$ and $2R$ are connected in parallel, the ratio of heat generated in $2R$ and $R$ is