A JFET has high input impedance because _________________?

Related Mcqs:

1. The input control parameter of a JFET is __________________?

   A. gate voltage
   B. source voltage
   C. drain voltage
   D. gate current

2. In class A operation, the input circuit of a JFET is ____________ biased?

   A. forward
   B. reverse
   C. not
   D. none of the above

3. Which of the following devices has the highest input impedance ?

   A. JFET
   B. MOSFET
   C. Crystal diode
   D. ordinary transistor

4. The input impedance of a MOSFET is of the order of______________?

   A. O
   B. a few hundred O
   C. kO
   D. several MO

5. The two important advantages of a JFET are _________________?

   A. high input impedance and square-law property
   B. inexpensive and high output impedance
   C. low input impedance and high output impedance
   D. none of the above

6. A MOSFET differs from a JFET mainly because _________________?

   A. of power rating
   B. the MOSFET has two gates
   C. the JFET has a pn junction
   D. none of the above

7. A JFET is similar in operation to ___________ valve?

   A. diode
   B. pentode
   C. triode
   D. tetrode

8. In a p-channel JFET, the charge carriers are _____________?

   A. electrons
   B. holes
   C. both electrons and holes
   D. none of the above

9. The pinch-off voltage in a JFET is analogous to _____________ voltage in a vacuum tube?

   A. anode
   B. cathode
   C. grid cut off
   D. none of the above

10. A MOSFET is sometimes called______________ JFET?

    A. many gate
    B. open gate
    C. insulated gate
    D. shorted gate