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ECE :: Analog Electronics

Analog Electronics - Section 1
Analog Electronics - Section 2
Analog Electronics - Section 3
Analog Electronics - Section 4
Analog Electronics - Section 5
Analog Electronics - Section 6
Analog Electronics - Section 7
Analog Electronics - Section 8
Analog Electronics - Section 9
Analog Electronics - section-1
Analog Electronics - Section 10
Analog Electronics - Section 11
Analog Electronics - Section 12
Analog Electronics - Section 13
Analog Electronics - Section 14
Analog Electronics - Section 15
Analog Electronics - Section 16
Analog Electronics - Section 17
Analog Electronics - Section 18
Analog Electronics - Section 19
Analog Electronics - Section 20
Analog Electronics - Section 21
Analog Electronics - section-22
Analog Electronics - Section-23

  1. Assertion (A): In class A amplifier the distortion is minimum

    Reason (R): In class A amplifier collector current exists for 360° of input cycle

    2. A.
    Both A and R are correct and R is correct explanation for A
    B.
    Both A and R are correct but R is not correct explanation for A
    C.
    A is correct R is wrong
    D.
    A is wrong R is correct

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  2. Assertion (A): In a differential amplifier the current through common emitter resistor is called tail current

    Reason (R): CMRR of an op-amp indicates how a differential signal amplified

    3. A.
    Both A and R are correct and R is correct explanation for A
    B.
    Both A and R are correct but R is not correct explanation for A
    C.
    A is correct R is wrong
    D.
    A is wrong R is correct

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  3. Quartz crystal has

    4. A.
    very small Q
    B.
    small Q
    C.
    very high Q
    D.
    Q less than 1

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  4. The current ICBO

    5. A.
    increases with increases in temperature
    B.
    is normally greater for silicon transistor than germanium transistors
    C.
    mainly depends on the emitter base junction bias
    D.
    depends largely on the emitter doping

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  5. Assertion (A): In a push pull circuit each transistor stays in the active region for one half cycle

    Reason (R): A push pull amplifier has low distortion

    6. A.
    Both A and R are correct and R is correct explanation for A
    B.
    Both A and R are correct but R is not correct explanation for A
    C.
    A is correct R is wrong
    D.
    A is wrong R is correct

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  6. Which of the following statement is correct?

    7. A.
    A FET is a current controlled device
    B.
    A BJT is always reverse biased
    C.
    The semi-conductor material of the gate in an N-channel JFET is p-type
    D.
    JFET has higher input impedance than MOSFET

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  7. In a bipolar transistor at room temperature if the emitter current is doubled the voltage across its base emitter junction

    8. A.
    doubles
    B.
    halves
    C.
    increase by about 20 mV
    D.
    decrease by about 20 mV

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  8. Which one of the following power amplifier has the maximum efficiency?

    9. A.
    Class A
    B.
    Class B
    C.
    Class AB
    D.
    Class C

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  9. Negative feedback lowers the cut off frequency and increase the upper cut off frequency of amplifier.

    10. A.
    True
    B.
    False

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  10. In a single-stage RC coupled common emitter amplifier, the phase shift at the lower 3 dB frequency is

    11. A.
    zero
    B.
    135°
    C.
    180°
    D.
    225°

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