## Lakshya Education MCQs

Question: In a common emitter, unbypassed resister provides
Options:
 A. voltage shunt feedback B. current series feedback C. negative voltage feedback D. positive current feedback

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## More Questions on This Topic :

Question 1. 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
Question 2. The current gain of a bjt is
1.     gm r0
2.     gm / r0
3.     gm rπ
4.     gm /rπ
Question 3. An amplifier without feedback has a voltage gain of 50,input resistance os 1 kΩ & output resistance of 2.5kΩ.the input resistance of the current shunt negative feedback amplifier using the above amplifier with a feedbacik factor of 0.2 is
1.     1/11KΩ
2.     1/5KΩ
3.     5KΩ
4.     11KΩ
Question 4. The most commonly used amplifier in sample & hold circuits is
1.     A unity gain non-inverting amplifier
2.     A unity gain inverting amplifier
3.     An inverting amplifier with a gain of 10
4.     An inverting amplifiers with a gain of 100
Question 5. 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