Q. 3v, 5v and 7v are the three input voltage applied to the inverting input terminal of averaging amplifier. Determine the output voltage?

A
-5v
B
-10v
C
-15v
D
-20v
Solution:

The output voltage, Vo = -[(Va+Vb+Vc)/3] = -[(3+5+7)/3] =-5v

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