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Two bulbs have filaments of lengths, Emi...

Two bulbs have filaments of lengths, Emissi-vities and diameters in the ratio of 2 : 1. If ratio of their powers is 1 : 2 then, ratio of their temperatures is

A

`1:1`

B

`1:2`

C

`2:1`

D

`1:4`

Text Solution

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The correct Answer is:
B
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