A 100 W bulb is designed to operate at 220 V. If it is connected across a 110 V source, assuming the resistance remains constant, what power will it dissipate?

An electric bulb is rated ${\rm{220}}\,\,{\rm{V - 100}}\,\,{\rm{W}}$. The power consumed by it when operated on ${\rm{110}}\,\,{\rm{V}}$ will be

The maximum power dissipated in an external resistance $R$, when connected to a cell of emf $E$ and internal resistance $r$, will be

If resistance of the filament increases with temperature, what will be power dissipated in a $220\,\,V$ - $100\,\,W$ lamp when connected to $110\,\,V$ power supply

Two identical electric lamps marked $500\,\,W,\,\,220\,\,V$ are connected in series and then joined to a $110\,\,V$ line. The power consumed by each lamp is

The thermo-emf of a thermocouple varies with the temperature ${\rm{heta }}$ of the hot junction as $E = a\,{\rm{heta }}\,\, + \,\,b\,{{\rm{heta }}^2}$ in volts where the ratio $a/b$ is 700\,{\,^0}{\rm{C}}. If the cold junction is kept at 0\,{\,^0}{\rm{C}}, then the neutral temperature is

An electric kettle boils some water in ${\rm{16}}\,{\rm{ min}}$. Due to some defect, it becomes necessary to remove ${\rm{10}}\,\,{\rm{\% }}$ turns of heating coil of the kettle. Now, how much time will it take to boil the same of water ?

What is immaterial for an electric fuse?

According to Joule’s law, if the potential difference across a conductor having a material of specific resistance remains constant, then the heat produced in the conductor is directly proportional to

Three equal resistors connected in series across a source of e.m.f. together dissipate ${\rm{10}}\,\,{\rm{watt}}$. If the same resistors are connected in parallel across the same e.m.f., then the power dissipated will be

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