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Find the input and output voltage in voltage follower circuit?

Find the input and output voltage in voltage follower circuit? Correct Answer Vin=9v and Vout = 9v

Voltage follower has input voltage equal to output voltage. The closed loop voltage gain is equal to one. For example, take the input and output voltage to be 2v, then AF = Vout/Vin = 2v/2v = 1.

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