Series-Parallel Circuits

Q1: If the load in the given circuit is open, what is the unloaded output voltage?

A 0 V

B 4 V

C 16 V

D 20 V

ANS:C - 16 V

Find the current in the circuit:

Add R1 & R2 which are in series.

R1+R2 = 10 kohm.

Current, I = 2 m amps.

Since vout is taken,

V = IR1.

V = 2m*2k.

V = 4V.

Therefore Vout = 20-4 = 16V.

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