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Three electric bulbs of 40 W, 60 W and 1...

Three electric bulbs of 40 W, 60 W and 100 W have the tungsten wire of the same diamter. Then the longer wire is used by

A

`60W`

B

`100W`

C

`40W`

D

All use the same length

Text Solution

Verified by Experts

The correct Answer is:
C
`P=(V^(2))/(R)=(V^(2)A)/(rhol)impliesPalpha(1)/(l)`
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