Series-Parallel Circuits - Technical MCQs

If R₃ opens in the given circuit, the total resistance (R_T) between points A and B equals ____.

A 900

B 100

C 110

D infinite resistance

ANS:C - 110

If R3 opens; then R1 comes in SERIES with R2. So, RT = 10 + 100 = 110Ω.

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