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Electrical Engineering - Analog Electronics MCQs
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Electrical Engineering - Analog Electronics MCQs
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25 Questions

1. In a CB amplifier the maximum efficiency could be
2. Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1KΩ & output resistance of 250 ,are cascaded.The open circuit voltage gain of combined amplifier is
3. If  =0.98 ,Ico=6µA and Iβ=100µA for a transistor,then the value of Ic will be
4. Introducing a resistor in the emitter of a common amplifier stabilizes the dc operating point against variations in
5. Which of the following is not associated with a p-n junction
6. Class AB operation is often used in power large signal) amplifiers in order to
7. An amplifier using an opamp with slew rate SR=1v/µsec has a gain of 40db.if this amplifier has to faithfully amplify sinusoidal signals from dc to 20 KHz without introducing any slew-rate induced distortion, then the input signal level must not exceed
8. Which of the following statements is false?
9. MOSFET can be used as a
10. In an op-amp differentiator
11. The current gain of a BJT is
12. 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
13. In a full-wave rectifier using two ideal diodes,Vdc & Vm are the dc & peak values of the voltage respectively across a resistive load. If PIV is the peak inverse voltage of the diode, then the appropriate relationships for this rectifier is.
14. The ideal OP-AMP has the following characteristics.
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
16. An OPAMP has a slew rate of 5 V/µ S .The largest sine wave O/P voltage possible at a frequency of 1MHZ is
17. Which of the following amplifier circuit using junction transistor has the best gain?
18. Generally, the gain of a transistor amplifier falls at high frequencies due to the
19. The effective channel length of a MOSFET in a saturation decreases with increase in
20. In deriving ac equivalent circuit for an amplifier circuit we short circuit
21. A 741-type OP-AMP has a gain-bandwidth product of 1MHz.A non-inverting amplifier using this opamp & having a voltage gain of 20db will exhibit -3db bandwidth of
22. An ideal OP-AMP is an ideal
23. When a transistor is connected in common emitter mode, it with have
24. In all base driver amplifiers
25. Thermal runaway is not possible in FET because as the temperature of FET increases

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