Answer:
(1) 55W bulb has 220 ohms.
(2) 80W bulb has 150.25ohms.
(3) 135W bulb has 89.63ohms.
Explanation:
Power is related to voltage and resistance by.
[tex]P = \frac{V^2}{R}[/tex]
modifying this formula for R gives.
[tex]R = \frac{V^2}{P}[/tex]
we have fixed voltage for all three bulbs and powers are given, so we can use modified equation to calculate resistance.
(1) 55W
[tex]R = \frac{V^2}{P} = \frac{(110V)^2}{55W} =220ohms.[/tex]
(2) 80W
[tex]R = \frac{V^2}{P}=\frac{(110V)^2}{80W}=151.25ohms.[/tex]
(3) 135W
[tex]R = \frac{V^2}{P} = \frac{(110v)^2}{135W} =89.63ohms.[/tex]
