An operational amplifier is powered by a + - 15 volt supply, and a moderate pote

Question

An operational amplifier is powered by a + - 15 volt supply, and a moderate potential difference placed across its input terminals V+ and V- What voltage will appear at the output of the op amp? Select one: a. either 15 volts or -15 volts b. either 13.6 volts or -13.6 volts c. it entirely depends on the precise internal structure of the op amp d. Ax(V+ V-) volts Check In the figure below the operational amplifier is powered from a 1 5 volt power supply. Resistor R2 is 6 k omega, and the input signal is a voltage source of 200 mV with zero internal resistance (Rs = 0 k omega). What is the output voltage V0 in volts?

Explanation / Answer

in the first question , there is no feedback in opamp so output = -15 and +15 V

In the second figure

Vs =i*R1 = 200mV

i * 1000 = 200

V0 = -i*R2 = -200*6000/1000 = -1200mV

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