Question

Which of the following graph best represents the current voltage relationship of an incandescent light bulb

Answer 1

straight line passing through origin

Answer 2

•The graph that best represents the current voltage relationship of an incandescent light bulb is not a straight line.

•A normal filament bulb has its own resistance.

•The resistance of a bulb increases abruptly at the point when the current is too high because temperature is taken into account.

•As the current keeps flowing through the filament, it heats up and makes harder for electrons flow.

•So a bulb is non-ohmic and the graph is not a straight line.