Power in Circuits Video Lessons

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# 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

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###### Problem Details

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