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MCQs 1: The two input terminals of an opamp are labeled as______________?

High and low Positive and negative Inverting and non inverting Differential ans non differential
Answer Explanation

MCQs 2: For an op-amp having differential gain Av and common-mode gain Ac the CMRR is given by___________?

Av + Ac Av / Ac 1 + Av / AC. Ac / Av
Answer Explanation

MCQs 3: Hysteresis is desirable in Schmitt-trigger, because______________?

Energy is to be stored/discharged in parasitic capacitances Effects of temperature would be compensated Devices in the circuit should be allowed time for saturation and desaturation It would prevent noise from causing false triggering
Answer Explanation

MCQs 4: The output voltage Vo of the above circuit is____________?

-6V -5V -1.2V -0.2V
Answer Explanation

MCQs 5: In the above circuit the current ix is___________?

0.6A 0.5A 0.2A 1/12A
Answer Explanation

MCQs 6: An opamp has a slew rate of 5V/ S. the largest sine wave o/p voltage possible at a frequency of 1MHz is____________?

10 V 5 V 5V 5/2 V
Answer Explanation

MCQs 7: The approximate input impedance of the opamp circuit which has Ri=10k, Rf=100k, RL=10k?

∞ 120k 110k 10k
Answer Explanation

MCQs 8: An amplifier using an opamp with slew rate SR=1v/sec has a gain of 40db.If this amplifier has to faithfully amplify sinusoidal signals from dc to 20KHz without introducing any slew-rate induced distortion, then the input signal level exceed_____________?

795mV 395mV 795mV 39.5mV
Answer Explanation

MCQs 9: An ideal OP-AMP is an ideal__________?

Current controlled Current source Current controlled Voltage source Voltage controlled Voltage source Voltage controlled Current source
Answer Explanation

MCQs 10: How many op-amps are required to implement this equation Vo = V1?

4 3 2 1
Answer Explanation

MCQs 11: How many op-amps are required to implement this equationop-amps?

2 3 4 1
Answer Explanation

MCQs 12: The ideal OP-AMP has the following characteristics

Ri=∞ ,A=∞ ,R0=0 Ri=0 ,A=∞ ,R0=0 Ri=∞ ,A=∞ ,R0=∞ Ri=0 ,A=∞ ,R0=∞
Answer Explanation

MCQs 13: If ground is applied to the (+) terminal of an inverting op-amp, the (–) terminal will_____________?

Not need an input resistor Be virtual ground Have high reverse current Not invert the signal
Answer Explanation

MCQs 14: An ideal OP-AMP is an ideal______________?

Current controlled Current source Current controlled voltage source Voltage controlled voltage source voltage controlled current source
Answer Explanation

MCQs 15: A non inverting closed loop op amp circuit generally has a gain factor______________?

Less than one Greater than one Of zero Equal to one
Answer Explanation

MCQs 16: The closed-loop voltage gain of an inverting amplifier equal to______________?

The ratio of the input resistance to feedback resistance The open-loop voltage gain The feedback resistance divided by the input resistance The input resistance
Answer Explanation

MCQs 17: Calculate the cutoff frequency of a first-order low-pass filter for R1 = 2.5kΩ and C1 = 0.05μF___________?

1.273kHz 12.73kHz 127.3 kHz 127.3 Hz
Answer Explanation

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