Analog Electronics

11. Which of the following is not associated with a p-n junction

1. junction capacitance
2. charge storage capacitance
3. depletion capacitance
4. channel length modulation

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12. In a p-n junction diode under reverse bias , the magnitude of electric field is maximum at

1. the edge of the depletion region on the p-side
2. the edge of the depletion region on the n-side
3. the p-n junction
4. the center of the depletion region on the n-side

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13. An n- channel JFET has IDSS=2mA,and Vp=-4v.Its transconductance gm=in mA/V)for an applied gate to source voltage VGS=-2v is

1. 0.25
2. 0.5
3. 0.75
4. 1

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14. In a common emitter, unbypassed resister provides

1. voltage shunt feedback
2. current series feedback
3. negative voltage feedback
4. positive current feedback

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15. A constant current signal across a parallel RLC circuits gives an o/p of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ .At the frequency of 4KHZ,the o/p voltage will be

1. 1 v
2. 2v
3. 1.4v
4. 2.8v

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16. Class AB operation is often used in power large signal) amplifiers in order to

1. get maximum efficiency
2. remove even harmonics
3. overcome a crossover distortion
4. reducing collector dissipation

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17. The bandwidth of an RF tuned amplifier is dependent on

1. Q –factor of the tuned o/p circuit
2. Q –factor of the tuned i/p circuit
3. Quiescent operating point
4. Q-factor of the o/p and i/p circuits as well as quiescent operating point

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18. If =0.98 ,Ico=6μA and Iβ=100μA for a transistor,then the value of Ic will be

1. 2.3mA
2. 3.2mA
3. 4.6 mA
4. 5.2mA

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19. The MOSFET switch in its on-state may be considered equivalent to

1. resistor
2. inductor
3. capacitor
4. battery

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20. Most of the linear ICs are based on the two-transistor differential amplifier because of its

1. input voltage dependent linear transfer characteristic
2. high voltage gain
3. high input resistance
4. high CMRR

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