Electronics -2

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1)   Most of linear ICs are based on the two transistor differential amplifier because of its

  • [A] High input resistance
  • [B] input voltage dependent linear transfer characteristic
  • [C] High CMRR
  • [D] High voltage gain

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High CMRR

2)   If the feedback signal is returned to the input in series with the applied voltage, the input impedance ______

  • [A] becomes infinity
  • [B] increases
  • [C] does not change
  • [D] decreases

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increases

3)   Which of the following parameters is used for distinguishing between a small signal and a large-signal amplifier?

  • [A] Bandwidth
  • [B] Distortion
  • [C] Overall gain
  • [D] Instability

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Bandwidth

4)   Which of the following parameters is used for distinguishing between a small signal and a large-signal amplifier?

  • [A] Frequency response
  • [B] Harmonic Distortion
  • [C] Voltage gain
  • [D] Input/output impedances

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Input/output impedances

5)   Field effect transistor has

  • [A] large power gain
  • [B] large votage gain
  • [C] large input impedance
  • [D] large output impedance

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large input impedance

6)   The overall bandwidth of two identical voltage amplifiers connected in cascade will

  • [A] Be better if stage gain is low and worse if stage gain is high
  • [B] Be better than that of a single stage
  • [C] Remain the same as that of a single stage
  • [D] Be worse than that of a single stage

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Be worse than that of a single stage

7)   The electron relaxation time of metal A is s, that of B is s. The ratio of resistivity of B to resistivity of A will be

  • [A] 1.0
  • [B] 2.0
  • [C] 3.0
  • [D] 4.0

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2.0

8)   The logic gate which detects equality of two bits is

  • [A] EX-NOR
  • [B] EX-OR
  • [C] NOR
  • [D] NAND

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EX-NOR

9)   When a sinusoidal voltage wave is fed to a Schmitt trigger, the output will be

  • [A] rectangular wave
  • [B] asymmetric square wave
  • [C] trapezoidal wave
  • [D] triangular wave

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asymmetric square wave

10)   The output stage of an op-amp is usually a

  • [A] Transformer coupled class B amplifier
  • [B] Class A power amplifier
  • [C] Complementary emitter follower
  • [D] Class B amplifier

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Complementary emitter follower

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