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Question

Physics Question on Electromagnetic induction

Two bulbs marked 60 W, 220 V and 100 W, 220 V are connected in series and the series combination is now connected across a 220 V main supply. The power dissipiated in the circuit is

A

37.5 W

B

75 W

C

80 W

D

40 W

Answer

37.5 W

Explanation

Solution

When connected in series power dissipated \hspace15mm P_S= \frac {P_1P_2}{P_1+P_2} \hspace15mm = \frac {100 \times 60}{100+60}= \frac {6000}{160}=37.5 W