An incandescent lamp is marked " ".

PHYSICS · Multi-part · A Level · Physics · Electricity · Electricity

Problem

An incandescent lamp is marked "

60\,\text{W},\;240\,\text{V}

". (i) Find the resistance of the filament when the lamp is glowing at its rated conditions. (ii) Determine the current drawn by the lamp from a

240\,\text{V}

supply. (iii) The lamp is accidentally connected to a

120\,\text{V}

supply while its resistance remains the same as in part (i). Calculate the power it would now dissipate.