MCQs of Field effect transistors (FET) and its biasing (Basic Electronics - 3110016)

Basic Electronics (3110016) MCQs

MCQs of Field effect transistors (FET) and its biasing

Showing 71 to 80 out of 99 Questions

71.

In certain CS JFET amplifier, R_D = 1 KΩ, R_S = 560 Ω, V_DD= 10 V and g_m = 4500 μS. If the source resistor is completely bypassed, the voltage gain is ________

(a)	450
(b)	45
(c)	2.52
(d)	4.5

72.

A certain common-source JFET has a voltage gain off 10. If the source bypass capacitor is removed, ____________

(a)	The voltage gain will increase
(b)	The transconductance will increase
(c)	The voltage gain will decrease
(d)	The Q-point will shift

73.

A CS JFET amplifier has a load resistance of 10 KΩ and R_D = 820 Ω. If g_m = 5 mS and V_in= 500 mV, the output signal voltage is ________

(a)	2.05 V
(b)	25 V
(c)	0.5 V
(d)	1.89 V

74.

A CS JFET amplifier has a load resistance of 10 KΩ and R_D = 820 Ω. If g_m = 5 mS and V_in= 500 mV, If load resistance is removed, the output voltage will ________

(a)	Increase
(b)	Decrease
(c)	Stay the same
(d)	Be zero

75.

A D-MOSFET can operate in the

(a)	Depletion mode only
(b)	Enhancement mode only
(c)	Depletion -mode or enhancement-mode
(d)	Low impedance mode

76.

When an n-channel D-MOSFET has I_D > I_DSS, it

(a)	Will be destroyed
(b)	Is operating in the depletion mode
(c)	Is forward biased
(d)	Is operating in the enhancement mode

77.

The voltage gain of a D-MOSFET amplifier is dependent on

(a)	R_D
(b)	R_L
(c)	g_m
(d)	all of the above

78.

Which of the following devices revolutionized the computer industry?

(a)	JFET
(b)	D-MOSFET
(c)	E-MOSFET
(d)	Power FET

79.

The voltage that turns on an EMOS device is the

(a)	Gate-source cutoff voltage
(b)	Pinchoff voltage
(c)	Threshold voltage
(d)	Knee voltage

80.

Which of these may appear on the datasheet of an enhancement-mode MOSFET?

(a)	V_GS(TH)
(b)	I_D(ON)
(c)	V_GS(ON)
(d)	All of the above

Showing 71 to 80 out of 99 Questions