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# GATE EC 2022: Analog Quiz 6

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Question 1

If the op-amp circuit shown below is ideal then circuit can be used as a

Question 2

The op amp configuration shown below has following transfer function  s. The feedback resistance used has 1.5 MΩ , the value of capacitance will be ___________ µf.

Question 3

For the opamp biasing shown in figure, it was found experimentally even at zero bias the current flowing into positive terminal is 15nA and current flowing into negative terminal is 10nA. If the output voltage of op-amp is 8mV. The value of feedback resistance Rf is__________.

Assume (Rf≫ R). R = 0.5 kΩ

Question 4

Assuming the operational amplifier to be ideal, the gain Vout/Vin for the circuit shown in Figure is

Question 5

The following circuit has R = 10kΩ, C = 10μF. The input voltage is a sinusoid at 50Hz with an rms value of 10V. Under ideal conditions, the current is from the source is

Question 6

Find the capacitor voltage VC at t=1msec if switch is closed as t=0. Assume capacitor initially uncharged and op-amp is not saturated.
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