If power in $3\,\Omega $ is $27\,W$ then what is the power in $2\,\Omega $ ................. $W$
$8$
$16$
$12$
$15$
Two wires $A$ and $B$ of same material and mass have their lengths in the ratio $1 : 2$. On connecting them to the same source, the rate of heat dissipation in $B$ is found to be $5\,W$. The rate of heat dissipation in $A$ is............ $W$
If $2.2\,kW$ power is transmitted through a $100\,\Omega $ line at $22,000\,V,$ the power loss in the form of heat will be ............. $W$
The ratio of powers dissipatted respectively in $R$ and $3R$, as shown is:
The total power dissipated (in $watt$ ) in the circuit shown is
A cell of internal resistance $r$ drives current through an external resistance $R$ . The power delivered by the cell to the external resistance will be maximum when: