Wednesday 25 December 2013

Comprehensive Viva Questions On ECA


Comprehensive Viva Questions On ECA

1.       Resistance and Capacitors are used as a coupling components
2.      Transistor circuits may consist of Different Biasing techniques
3.      Current Gain may be defined as the ratio of input to output currents
4.      In Darlington connection the leakage current of first transistor is Amplified by the second transistor
5.      For A.C signal the capacitor acts as a short circuit in Boot Strap Emitter Follower
6.      Band Width of the amplifier is defined as the difference between the Higher and Lower frequencies
7.      The Octaves and Decades are the measure in frequencies
8.     The input-output characteristics of an amplifier are Non-Linear
9.      In Trade-Off the higher VRD limits the Maximum Voltage Swing
10.  When part of output and input signal are out of phase the feedback is called Negative Feedback
11.   The Transfer Gain of the amplifier is not constant
12.  A device which works on the principle of positive feedback is called an Oscillator
13.  The oscillators are classified based on the nature of  Output Voltage
14.  The circuit using elements L and C is called Tank Circuit
15.   The changes in the load connected, affect the effective resistance of the Tank Circuit


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