The finite voltage gain of a non-inverting operational amplifier is A and the resistance used is R1 and R2 in which R2 is the feedback resistance. Under what conditions it can one use the expression 1 + R2/R1 to determine the gain of the amplifier?

The finite voltage gain of a non-inverting operational amplifier is A

1.	The finite voltage gain of a non-inverting operational amplifier is A and the resistance used is R₁ and R₂ in which R₂ is the feedback resistance. Under what conditions it can one use the expression 1 + R₂/R₁ to determine the gain of the amplifier?
A.	A ~ R<sub>2</sub>/R<sub>1</sub>
B.	A >> R<sub>2</sub>/R<sub>1</sub>
C.	A << R<sub>2</sub>/R<sub>1</sub>
D.	None of the mentioned
Answer» C. A << R<sub>2</sub>/R<sub>1</sub>

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The finite voltage gain of a non-inverting operational amplifier is A and the resistance used is R1 and R2 in which R2 is the feedback resistance. Under what conditions it can one use the expression 1 + R2/R1 to determine the gain of the amplifier?

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The finite voltage gain of a non-inverting operational amplifier is A and the resistance used is R₁ and R₂ in which R₂ is the feedback resistance. Under what conditions it can one use the expression 1 + R₂/R₁ to determine the gain of the amplifier?