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The tungsten filament of an electric lam...

The tungsten filament of an electric lamp has a surface areaA and a power rating P. If the emissivity of the filament is `varepsilon` and `sigma` is Stefan's constant,the steady temperature of the filament will be:

A

`T=(P/(Axis Sigma)^4`

B

`t=(P/(Axisigma)`

C

`T=((Axisigma)/P)^(1/4)`

D

`T=(P/(Axisigma))^(1/4)`

Text Solution

Verified by Experts

The correct Answer is:
D
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