Uttar Pradesh PSC Exam: Electronics MCQs (Practice_Test 8 of 13)

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  1. A non inverting closed loop op amp circuit generally has a gain factor
    1. Less than one
    2. Greater than one
    3. Of zero
    4. Equal to one

    Answer: b

  2. If ground is applied to the (+) terminal of an inverting op-amp, the (—) terminal will
    1. Not need an input resistor
    2. Be virtual ground
    3. Have high reverse current
    4. Not invert the signal

    Answer: b

  3. The closed-loop voltage gain of an inverting amplifier equal to
    1. The ratio of the input resistance to feedback resistance
    2. The open-loop voltage gain
    3. The feedback resistance divided by the input resistance
    4. The input resistance

    Answer: c

  4. An ideal OP-AMP is an ideal
    1. Current controlled Current source
    2. Current controlled voltage source
    3. Voltage controlled voltage source
    4. voltage controlled current source

    Answer: b

  5. Calculate the cutoff frequency of a first-order low-pass filter for R1 = 2.5 k and C1 = 0.05 F
    1. 1.273kHz
    2. 12.73kHz
    3. 127.3 kHz
    4. 127.3 Hz

    Answer: a

  6. How many op-amps are required to implement this equation Vo = V1
    1. 4
    2. 3
    3. 2
    4. 1

    Answer: d

  7. An OPAMP has a slew rate of 5 V/µS. The largest sine wave O/P voltage possible at a frequency of 1 MHZ is
    1. 10 volts
    2. 5 volts
    3. volts
    4. volts

    Answer: d

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