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  • Two electric bulbs have tungsten filament of same length. If one of them gives 60 W and the other 100 W, then  Option: 1 100 W bulb ha th

Two electric bulbs have tungsten filament of same length. If one of them gives 60 W and the other 100 W, then
 

Option: 1

100 W bulb ha thicker filament
 


Option: 2

 60 W bulb has thicker filament
 


Option: 3

 Both filaments are of same thickness
 


Option: 4

 It is not possible to get different wattages unless the lengths are different


Answers (1)

best_answer

\mathrm{P=\frac{V^2}{R}}. If P is more, R is less. \mathrm{R=\rho^\frac{ \ell }{a}}. For less R, 'a' is more. So, the 100 \mathrm{~W} bulb has thicker element

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Pankaj

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