Question

Of the two bulbs in a house, one glows brighter than the other. Which of the following statements is correct?

(a) The brightness does not depend on resistance.

(b) Both the bulbs have the same resistance.

(c) The brighter bulb has larger resistance.

(d) The dimmer bulb has larger resistance.

Answer 1

(d) The dimmer bulb has larger resistance

The dimmer bulb has larger resistance than the brighter one.

Power of the bulb ∝ 1 / Resistance

Resistance is the obstruction offered to the flow of current.