Series-Parallel Circuits

Q1: If the load in the given circuit is 120 k , what is the loaded output voltage?

A 4.21 V

B 15.79 V

C 16 V

D 19.67 V

ANS:B - 15.79 V

resistor 120k is parallel with 8k.
So r=1/120+1/8 = 7.5k.
vout=r2/(r1+r2) = 7.5/((2+7.5).
= 15.78947368421053 V,
= 15.79 V.

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