Question

Of the two bulbs in a house, one glows brighter than the other. Which of the two has a larger resistance?

A. the dim bulb 

B. the brighter bulb 

C. both have the same resistance 

D. becomes four times

Answer 1

The brightness of a bulb is representation of the power dissipated by the bulb.

The power is given by

P = \(\frac{V^2}{R}\)

So, the dimmer bulb has larger resistance.