Parallel Circuits - Technical MCQs

Q1:

What does VS equal in the given circuit?

A 0 V

B 9 V

C 27 V

D More information is needed to find VS.

ANS:B - 9 V

I3 = V3/R3 = 9V/1.8KOhm = 5mA.

V = I3R3 = 5*1.8 = 9V.

Therefore Vs = 9V.