Series-Parallel Circuits

Q1: In the given circuit, the total resistance (R_T) between points A and B equals _____.

A 10

B 100

C 900

D 1,010

ANS:B - 100

r2 and r3 are parallel. So r2*r3/r2+r3 = 90 ohm.

Then r1 and new resistance will be series. So 10 ohm + 90 ohm = 100 ohm.

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