Question

Wgy does an elwctric bulb become dim when a elcetric heater in a parallel combination is switched on ?Why does dimness decreases after sometime.

Answer 1

Explanation:

The electric bulb will dim in a parallel circuit when another appliance is turned on because the heater is now consuming power from the same electricity source, which means that the light bulb does not have as much to run on as it did when the heater was not turned on. When it does not have as much power to run on it cannot fully light the bulb, resulting in a dimmer bulb.

If you wanted to know why the bulb becomes more dim after time, it is because maybe the heater is using more and more electricity, leaving less and less electricity for the light bulb to use.