Two bulbs have filaments of lengths, Emissivities and diameters in the ratio of 2 :1. If ratio of their powers is 1 : 2 then, ratio of their temperature is

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

1 : 1

1 : 2

2 : 1

1 : 4

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

P1P2=σ1A1T14σ2A2T24=σ12πr1l1σ22πr2l2T1T2412=212121T1T24116=T1T24T1T2=12

Watch 3-min video & get full concept clarity