46. The input gate current of a FET is :
(a) A few amperes
(b) A few milliamperes
(c) A few micro amperes
(d) Negligibly small
47. When drain voltage equals the pinch-off voltage, then drain current ……. with the increase in drain voltage.
(a) decreases
(b) increases
(c) remains constant
(d) none of the above
48. If the reverse bias on the gate of a JFET is increased, then width of the conducting channel …….
(a) is decreased
(b) is increased
(c) remains the same
(d) none of the above
49. A JFET has ……. power gain.
(a) small
(b) very high
(c) very small
(d) none of the above
50. The input control parameter of a JFET is …….
(a) gate voltage
(b) source voltage
(c) drain voltage
(d) gate current
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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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