Problem: Which has a larger resistance, a 60 watt lightbulb or a 100 watt lightbulb ?

FREE Expert Solution

Power:

$\overline{){\mathbf{P}}{\mathbf{=}}{\mathbf{i}}{\mathbf{V}}}$

$\overline{){\mathbf{P}}{\mathbf{=}}{{\mathbf{i}}}^{{\mathbf{2}}}{\mathbf{R}}}$

Resistance, R = P/i2

Take the voltage to be 230V for both the bulbs.

For 60 watt lightbulb,

i = P/V = 60/230 = 0.26 A

Problem Details

Which has a larger resistance, a 60 watt lightbulb or a 100 watt lightbulb ?