FET – 2 – 3

61. If the gate of a JFET is made less negative, the width of the conducting channel …….

(a) remains the same
(b) is decreased
(c) is increased
(d) none of the above

ANSWER

EXPLANATION

62. The pinch-off voltage of a JFET is about …….

(a) 5 V
(b) 0.6 V
(c) 15 V
(d) 25 V

ANSWER

EXPLANATION

63. The gate voltage in a JFET at which drain current becomes zero is called ………….. voltage.

(a) saturation
(b) pinch-off
(c) active
(d) cut-off

ANSWER

EXPLANATION

64. The drain current ID in a JFET is given by …………..

(a) ID=IDSS{1-(VGS/VP)}^2
(b) ID=IDSS{1+(VGS/VP)}^2
(c) ID=IDSS{1-(VP/VGS)}^2
(d) ID=IDSS{1+(VP/VGS)}^2

ANSWER

EXPLANATION

65. In a FET, there are …………… pn junctions at the sides.

(a) three
(b) four
(c) five
(d) two

ANSWER

EXPLANATION

1 2 3 4 5 6 7

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