_____________ Has The Lowest Noise-Level?
_____________ Has The Lowest Noise-Level?
 | Tetrode |
 | JFET |
| Ordinary Trnsistor |
| Triode |
Electrical Engineering mcqs
Which Of The Following Devices Has The Highest Input Impedance ?
Which Of The Following Devices Has The Highest Input Impedance ?
| Jfet |
| Crystal Diode |
| MOSFET |
| Ordinary Transistor |
When Drain Voltage Equals The Pinch-Off-Voltage, Then Drain Current ___________ With The Increase In Drain Voltage?
When Drain Voltage Equals The Pinch-Off-Voltage, Then Drain Current ___________ With The Increase In Drain Voltage?
| Increases |
| None Of The Above |
| remains constant |
| Decreases |
The Two Important Advantages Of A Jfet Are _________________?
The Two Important Advantages Of A Jfet Are _________________?
| Inexpensive And High Output Impedance |
| None Of The Above |
| high input impedance and square-law property |
| Low Input Impedance And High Output Impedance |
The Transconductance Of A Jfet Ranges From ________________?
The Transconductance Of A Jfet Ranges From ________________?
| 100 To 500 Ma/V |
| 0.5 to 30 mA/V |
| Above 1000 Ma/V |
| 500 To 1000 Ma/V |
The Source Terminal Of A Jeft Corresponds To _____________ Of A Vacuum Tube?
The Source Terminal Of A Jeft Corresponds To _____________ Of A Vacuum Tube?
| Grid |
| Plate |
| None Of The Above |
| cathode |
The Pinch-Off Voltage Of A Jfet Is About _______________?
The Pinch-Off Voltage Of A Jfet Is About _______________?
| 15 V |
| 0.6 V |
| 25 V |
| 5 V |
The Pinch-Off Voltage In A Jfet Is Analogous To _____________ Voltage In A Vacuum Tube?
The Pinch-Off Voltage In A Jfet Is Analogous To _____________ Voltage In A Vacuum Tube?
| Cathode |
| None Of The Above |
| grid cut off |
| Anode |
The Output Characteristics Of A Jfet Closely Resemble The Output Characteristics Of A ___________ Valve?
The Output Characteristics Of A Jfet Closely Resemble The Output Characteristics Of A ___________ Valve?
| Triode |
| pentode |
| Diode |
| Tetrode |
The Input Impedance Of A Mosfet Is Of The Order Of______________?
The Input Impedance Of A Mosfet Is Of The Order Of______________?
| several MO |
| Ko |
| O |
| A Few Hundred O |
The Input Control Parameter Of A Jfet Is __________________?
The Input Control Parameter Of A Jfet Is __________________?
| gate voltage |
| Drain Voltage |
| Source Voltage |
| Gate Current |
The Gate Voltage In A Jfet At Which Drain Current Becomes Zero Is Called ______________ Voltage?
The Gate Voltage In A Jfet At Which Drain Current Becomes Zero Is Called ______________ Voltage?
| Cut-Off |
| Saturation |
| pinch-off |
| Active |
The Gate Of A Jfet Is ___________ Biased?
The Gate Of A Jfet Is ___________ Biased?
| Reverse As Well As Forward |
| reverse |
| Forward |
| None Of The Above |
The Constant-Current Region Of A Jfet Lies Between______________?
The Constant-Current Region Of A Jfet Lies Between______________?
| Cut Off And Pinch-Off |
| Cut Off And Saturation |
| And Idss |
| pinch-off and breakdown |
The Channel Of A Jfet Is Between The ________________?
The Channel Of A Jfet Is Between The ________________?
| Gate And Source |
| Input And Output |
| drain and source |
| Gate And Drain |
N A Common-Source Jfet Amplifier, The Output Voltage Is _____________?
N A Common-Source Jfet Amplifier, The Output Voltage Is _____________?
| Taken At The Source |
| In Phase With The Input |
| 90o Out Of Phase With The Input |
| 180o out of phase with the input |
In Class A Operation, The Input Circuit Of A Jfet Is ____________ Biased?
In Class A Operation, The Input Circuit Of A Jfet Is ____________ Biased?
| Forward |
| reverse |
| None Of The Above |
| Not |
In A P-Channel Jfet, The Charge Carriers Are _____________?
In A P-Channel Jfet, The Charge Carriers Are _____________?
| Electrons |
| None Of The Above |
| Both Electrons And Holes |
| holes |
In A Jfet, When Drain Voltage Is Equal To Pinch-Off Voltage, The Depletion Layers ______________?
In A Jfet, When Drain Voltage Is Equal To Pinch-Off Voltage, The Depletion Layers ______________?
| Have Large Gap |
| almost touch each other |
| None Of The Above |
| Have Moderate Gap |
In A Jfet, Idss Is Known As ________________?
In A Jfet, Idss Is Known As ________________?
| None Of The Above |
| Drain To Source Current With Gate Open |
| Drain To Source Current |
| drain to source current with gate shorted |