A 50W bulb is in series with a room heater and the combination is connected across the mains. To get max. heater output, the 50W bulb should be replaced by

The resistance of bulb RB = V2/P

A 5OW is replaced by 100W, the resistance of bulb decreases, the current supplied by battery increases, hence power consumed in helter increases.

Leave a Comment

Your email address will not be published. Required fields are marked *


Free Class