Q.No.151: - It is impracticable to connect an electric bulb and an electric heater in series. Why?

Q.No.151: - It is impracticable to connect an electric bulb and an electric heater in series. Why?

Ans: - In series connection current remains same and voltage divided according to the resistance of the appliance. When we put electric bulb and electric heater in series then it will divide the voltage which ultimately divided the power double.

Q.No.150: - A certain flash-light can use a 10ohm bulb or a 5ohm bulb. Which bulb should be used to get the brighter light? Which bulb will discharge the battery first?

Q.No.150: - A certain flash-light can use a 10ohm bulb or a 5ohm bulb. Which bulb should be used to get the brighter light? Which bulb will discharge the battery first?

Ans: - If the bulbs are connected in parallel then they will have same brightness because the brightness depends upon the voltage. If the bulbs are connected in series then first bulb will be brighter than the second because in series the voltage drop is different in two bulbs. The bulb which has more resistance will discharge the battery soon.