11. The input impedance of FET :
(a) Is less than 10 kΩ
(b) Is greater than 10 MΩ
(c) Falls within a range between 10 kΩ and 10 MΩ
(d) Is less than 1 kΩ
12. With reference to JFET configuration, match the following
(P) Common Source Configuration (1) No phase shift between input & output
(Q) Common Drain Configuration (2) High input impedance & low output impedance
(R) Common Gate Configuration (3) Source follower Configuration
(a) P-1, Q-2, R-3
(b) P-2, Q-3, R-1
(c) P-2, Q-1, R-3
(d) P-3, Q-1, R-2
13. Conduction modulation is exhibited by :
(a) Transistor
(b) Diode
(c) JFET
(d) Tunnel diode
14. Junction gate type of FET can be operated :
(a) Only in depletion mode
(b) Only in enhancement mode
(c) Both depletion & enhancement modes
(d) Either depletion or enhancement mode
15. The constant current area of FET lies between :
(a) 0 & IDSS
(b) Cut off & Pinch off regions
(c) Cut off & Saturation regions
(d) Pinch-off & break-down regions
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FET » Exercise - 150. The input control parameter of a JFET is ....... (a) gate voltage (b) source voltage (c) drain voltage (d) gate current- FET » Exercise - 2 51. A common base configuration of a pnp transistor is analogous to ....... of a JFET. (a) common source configuration (b) common drain configuration (c) common gate configuration (d) none of the above 52. A JFET has high input impedance because ....... (a) it is made of semiconductor material (b) input is reverse biased (c) of impurity atoms (d) none of the above 53. In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers ....... (a) almost touch each other (b) have large gap (c) have moderate gap (d) none of the above 54. In a JFET, IDSS is known as .............. (a) drain to source current (b) drain to source current with gate shorted (c) drain to source current with gate open (d) none of the above 55. 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 56. .............. has the lowest noise-level. (a) triode (b) ordinary transistor (c) tetrode (d) JFET 57. A MOSFET is sometimes called ....... JFET. (a) many gate (b) open gate (c) insulated gate (d) shorted gate…
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