A JFET has high input impedance because _________________?
Correct answer: B. input is reverse biased
- A. it is made of semiconductor material
- B. input is reverse biased
- C. of impurity atoms
- D. none of the above
Explanation
The JFET gate-channel junction is reverse biased, so it permits only a very small leakage current and therefore presents high input impedance. Semiconductor construction or impurity atoms alone do not explain this property.
Last updated
Practise Electronics and Devices
758 free Electronics and Devices MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
1 db corresponds to_____________change in power level?
A 1,000 V power supply would use_____________ as a filter capacitor?
A 10 V power supply would use ____________ as filter capacitor?
A 2-transistor class B power amplifier is commonly called ______________ amplifier?
A 25eV electron has a speed of______________?