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Series-Parallel Circuits - Technical MCQs

Q1:

How much current is flowing through R1 in the given circuit?

A 0.3 A

B 0.15 A

C 0.5 A

D 0.68 A

ANS:C - 0.5 A

(R2//R3//R4)are in parallel=24,
R1&(R2//R3//R4)are in series(68+24=92),

So I=(V/R)(46/92=0.5A)

Current through R1 also 0.5A because R1&(R2//R3//R4)are in series ( in the series circuit current is same)