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OP amp - section-1
  1. In differential-mode, ___________

    2. A.

     opposite polarity signals are applied to the inputs
    B.

     the gain is one
    C.

     the outputs are of different amplitudes
    D.

     only one supply voltage is used

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  2. Assume that the OP-amp of the fig. is ideal. If Vi is a triangular wave, then V0 will be

    3. A.

     Square wave
    B.

     Triangular wave
    C.

     Parabolic wave
    D.

     Sine wave

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  3. The differential gain is

    4. A.

     very high
    B.

     very low
    C.

     dependent on input voltage
    D.

     about 100

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  4. When a number of stages are connected in parallel, the overall gain is the product of the individual stage gains

    5. A.

     True
    B.

     False

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  5. For an ideal OP-amp, which of the following is true?

    6. A.

     The differential voltage across the input terminals is zero
    B.

     The current into the input terminals is zero
    C.

     The current from output terminal is zero
    D.

     The output resistance is zero

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  6. The OP-amp can amplify

    7. A.

     c. signals only
    B.

     d.c. signals only
    C.

     both a.'and d.'signals
    D.

     neither 'c. nor a.c. signals

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  7. In the differential voltage gain & the common mode voltage gain of a differential amplifier are 48db & 2db respectively, then its common mode rejection ratio is

    8. A.

     23dB
    B.

     25dB
    C.

     46dB
    D.

     50dB

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  8. When a differential amplifier is operated single-ended, ___________

    9. A.

     the output is grounded
    B.

     one input is grounded and signal is applied to the other
    C.

     both inputs are connected together
    D.

     the output is not inverted

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  9. Negative feedback ___________

    10. A.

     increases the input and output impedances
    B.

     increases the input impedance and bandwidth
    C.

     decreases the output impedance and bandwidth
    D.

     does not affect impedance or bandwidth

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  10. A voltage follower ___________

    11. A.

     has a voltage gain of 1
    B.

     is noninverting
    C.

     has no feedback resistor
    D.

     has all of these

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