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___________?

Related Mcqs:

1. A source follower using an FET usually has a voltage gain which is___________?

   A. greater than +100 B. slightly less than unity but positive C. exactly unity but negative D. about -10...

2. A dc power supply has no-load voltage of 30v,and a full-load voltage of 25v at full-load current of 1A.Its output resistance & load regulation ,respectively are_____________?

   A. 5 Ω & 20 % B. 25 Ω & 20 % C. 5 Ω & 16.7 % D. 25 Ω & 16.7 %...

3. In the differential voltage gain & the common mode voltage gain of a differential amplifier are 48db &2db respectively, then its common mode rejection ratio is__________?

   A. 23dB B. 25dB C. 46dB D. 50dB...

4. An OPAMP has a slew rate of 5 V/μ S .The largest sine wave O/P voltage possible at a frequency of 1 MHZ is [Hint: Slew rate is defined as the max. rate of change of output voltage. Its unit is V/μS.

   A. 10 volts B. 5 volts C. 5/1 volts D. 5/2 volts...

5. The action of JFET in its equivalent circuit can best be represented as a_____________?

   A. Current controlled Current source B. Current controlled voltage source C. Voltage controlled voltage source D. voltage controlled current source...

6. 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 feedback factor of 0.2 is___________?

   A. 1/11KΩ B. 1/5KΩ C. 5KΩ D. 11KΩ...

7. 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_________?

   A. 49dB B. 51dB C. 98dB D. 102dB...

8. 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____________?

   A. Vdc = Vm/π, PIV=2Vm B. Vdc = 2Vm/π, PIV=2vm C. Vdc = 2Vm/π, PIV=Vm D. Vdc = Vm/π, PIV=Vm...

9. The effective channel length of a MOSFET in a saturation decreases with increase in___________?

   A. Gate voltage B. Drain voltage C. Source voltage D. Body voltage...

10. To prevent a DC return between source and load, it is necessary to use___________?

    A. resistor between source and load B. inductor between source and load C. capacitor between source and load D. either A. or B....