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A 741 op amp has an open-loop voltage gain of 2 × 10 5, input resistance of 2 MΩ, and output resistance of 50 Ω. The op amp is used in the circuit of Fig.(a). Find the closed-loop gain vo/vs. Determine current i when vs = 2V. (a) (b) (a) original circuit, (b) the equivalent circuit.

A 741 op amp has an open-loop voltage gain of 2 × 10 5, input resistance of 2 MΩ, and output resistance of 50 Ω. The op amp is used in the circuit of Fig.(a). Find the closed-loop gain vo/vs. Determine current i when vs = 2V. (a) (b) (a) original circuit, (b) the equivalent circuit.

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A 741 op amp has an open-loop voltage gain of 2 × 10 5 , input resistance of 2 M Ω , and output resistance of 50 Ω . The op amp is used in the circuit of Fig.(a). Find the closed-loop gain v o / v s . Determine current i when v s = 2 V .
(a)
(b)
(a) original circuit, (b) the equivalent circuit.

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