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Parallel Circuits - Technical MCQs

Q1:

What does R1 equal in the given circuit?

A 90 omega.gif

B 180 omega.gif

C 200 omega.gif

D 1.8 komega.gif

ANS:B - 180 omega.gif

VIKAS, since I=50mA i.e 50*10^-3
so,IF IT GOES TO MUMERATOR IT WILL BECOME 10^3


i.e

R=9/50*10^-3= 9*10^3/50 =180