A steel wire has a resistance twice that of an aluminium wire. Both of them are connected with a constant voltage supply. More heat will be dissipated in
Steel wire when both are connected in series
Aluminium wire when both are connected in parallel
Aluminium wire when both are connected in series
Both $(a)$ and $(b)$
Two wires with resistances $R$ and $2R$ are connected in parallel, the ratio of heat generated in $2R$ and $R$ is
The figure shows three circuits $I, II$ and $III$ which are connected to a $3\,V$ battery. If the powers dissipated by the configurations $I, II$ and $III$ are $P_1 , P_2$ and $P_3$ respectively, then
Electric room radiator which operates at $225\, volts$ has resistance of $50\, ohms$. Power of the radiator is approximately ............... $W$
Two bulbs, one of $50\, watt$ and another of $25\, watt$ are connected in series to the mains. The ratio of the currents through them is
Three $60\, W$ light bulbs are mistakenly wired in series and connected to a $120\,V$ power supply. Assume the light bulbs are rated for single connection to $120\,V$. With the mistaken connection, the power dissipated by each bulb is: .................. $W$