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QAIPMT-2007-Ph-2333: NEET 2007 Physics - Class 12 AIPMT-2007-Ph-2333 Solution: A black body is at \(727^ C\). It emits energy at a rate which…

A black body is at

727^\circ C

. It emits energy at a rate which is proportional to

(1000)^4

(1000)^2

(727)^4

(727)^2

Step-by-Step Verified Solution

Efficiency of the transformer = P o u t p u t P i n p u t _ 100 = 100 220 _ 0.5 _ 100 = 90 %