Question

A filament bulbs 500 watt and 100 watt is to be used in 230 watt main supply when a resistance r is connected in the series it works perfectly and the bulb consume 500 watt find the value of r

Answer 1

Answer:

ANSWER

IfR=r

P  max  =  4r E 2

ρ=VI

I=  V  B ρ  =  100 500  =5A

V  R  =IR=(230−100)=5R

R=26Ω

Hence , option A is the correct answer.

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Explanation:

Answer 2

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