SSC JE Electrical Engineering 24 Jan 2018 Evening Paper

Question : 175 of 200

Marks: +1, -0

Two incandescent lamps of wattage 40W, 60W are connected in series with voltage of 230 V. Which out of the two lamps will glow brighter?

Solution:

R_1=V^2/60,R_2=V^2/40

So Resistance of

R_1

is less and

R_2

is high the

I ^2R

loss across R_$$2 is high. So, bulb rating 40 watt brighter.

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