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FET – 1 – 1

1. The JFET acts as a ……….. along vertical parts of the drain curve.

(a) Resistor
(b) Current source
(c) Voltage source
(d) Current sink

ANSWER

EXPLANATION

2. The transconductance curve of JFET which is also called as square law curve is :

(a) Straight line
(b) Parabolic
(c) Circular
(d) Wavy

ANSWER

EXPLANATION

3. Which of the following is/are valid statement(s) ?
    1. The gate of a JFET is forward biased hence acts as a voltage controlled device.
    2. The gate of a JFET is reversed biased, hence acts as a voltage controlled device.
    3. The gate of a JFET is reverse biased, hence acts as voltage controlled device.

(a) 1
(b) 2
(c) 1 and 2
(d) 1, 2 and 3

ANSWER

EXPLANATION

4. Field effect transistor has :

(a) large input impedance
(b) large output impedance
(c) large power gain
(d)
 large voltage gain

ANSWER

EXPLANATION

5. In the voltage range, Vp < VDS< BVDSS of an ideal JFET or MOSFET :

(a) the drain current varies linearly with VDS
(b) the drain current is constant

(c) the drain current varies non-linearly with VDS
(d) the drain current is cut off

ANSWER

EXPLANATION

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