A torch bulb draws a current of from a dry cell.

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

Problem

A torch bulb draws a current of

0.25\,\text{A}

from a

3\,\text{V}

dry cell. (i) Calculate the resistance of the bulb. (ii) If the same bulb is connected to a

1.5\,\text{V}

cell and its resistance remains unchanged, find the current that will flow.