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Question

Match the following:

List I List II

A. Copper 1. produces discrete energy level just above valence band

B. Rubber 2. produces discrete energy level just below conduction band

C. Antimony 3. large forbidden gap

D. Boron 4. valence and conduction bands overlap

Options
A. A-1, B-2, C-4, D-3
B. A-4, B-1, C-2, D-3
C. A-4, B-3, C-1, D-2
D. A-2, B-1, C-3, D-4

Correct Answer

A-4, B-3, C-1, D-2

More questions

1. The continuous time system with impulse response h(t) = is stable, for n is even, when
Options
A. a = 0
B. a > 0
C. a < 0
D. a ? 0

2. The function f(x - v_ot) represent which of the following?
Options
A. A stationary wave
B. A wave motion in forward direction
C. A wave motion in reverse direction
D. None of the above

3. A radar receiver has a noise figure of 10 dB at 300 K having a bandwidth of 2.5 MHz. The minimum power it can receive is
Options
A. 3.45 x 10^-15 W
B. 1.38 x 10^-15 W
C. 7.5 x 10^-15 W
D. 93.15 x 10^-15 W

4. Which of the following can not be used as a variable name in C?
Options
A. else
B. coal
C. ram
D. vendy

6. A transistor has a current gain of 0.99 in the CB mode. Its current gain in the CC mode is
Options
A. 100
B. 99
C. 1.01
D. 0.99

7. Match the following:

	List I		List II
A.	Bode	1.	Asymptotic plots
B.	Evans	2.	Polar plots
C.	Nyquist	3.	Root locus technique
		4.	M and N circles

Options
A. A-1, B-4, C-2
B. A-2, B-3, C-4
C. A-3, B-1, C-4
D. A-1, B-3, C-2

8. A forward voltage of 9 V is applied to a diode in series with a 1 k? load resistor. The voltage across load resistor is zero. It indicates that
Options
A. diode is short circuited
B. diode is open circuited
C. resistor is open circuited
D. diode is either short circuited or open circuited

9. In a circular waveguide the dominant mode is
Options
A. TE₀₁
B. TE₁₁
C. TE₂₀
D. TE₂₁

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