Question is ⇒ Oscillator crystal is made of, Options are ⇒ (A) silicon, (B) germanium, (C) diamond, (D) quartz, (E) , Leave your comments or Download question paper.

Question is ⇒ Oscillator crystal is made of, Options are ⇒ (A) silicon, (B) germanium, (C) diamond, (D) quartz, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Oscillator crystal is made of
A.	silicon [Wrong Answer]
B.	germanium [Wrong Answer]
C.	diamond [Wrong Answer]
D.	quartz [Correct Answer]
View Answer 2 -1 Explanation:- Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

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⇒

Assertion (A): δ(t - b) is an impulse occuring at t = b

Reason (R): Intergal of unit impulse gives unit step function.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is true, R is false
A is false, R is true

⇒ The life time of a geosynchronous communication
5
10
20
50

⇒ In computers the size of secondary memory is usually much larger than that of primary memory.
TRUE
FALSE

⇒

Assertion (A): Wien bridge can be used for measuring frequency.

Reason (R): A frequency meter for 50 Hz system has a frequency range of 40 to 60 Hz.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true R is false
A is false R is true

⇒ In an LC immittance H (s)
the slope of dH (jω)/dω is always negative
the slope of dH (jω)/dω is always positive
the slope of dH (jω)/dω may be positive or negative
the slope of dH (jω)/dω is constant

⇒

Match the following:

	List I		List II
A.	Detection of a periodic signal in noise	1.	Increase in band-width
B.	Recovery of a band limited signal from its uniformly sampled values	2.	Slope over load error
C.	Finer quantization	3.	Nyquist rate of signals
D.	Delta modulation	4.	Cross correlation

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

⇒ Two voltages are 50 ∠0 V and 75 ∠ - 60° V. The sum of these voltages is
109 ∠ - 60° V
109 ∠ - 25° V
109 ∠ - 36.6° V
100 ∠ - 50.1° V

⇒ The RF section of a radio transmit generally consists of
master oscillator
final power amplifier to feed antenna
buffer stage
all of the above

⇒ Which of the following waves do not exist in waveguides?
TE waves
TM waves
TE and TM waves
TEM waves

⇒ The carrier frequency will be if L = 50 µH and C = 1 nF.
512
612 kHz
712 kHz
812 kHz

⇒ A carry look ahead adder is frequently used for addition because
it costs less
it is faster
it is more accurate
is uses fewer gates

⇒ Which of the following has the highest input impedance?
CE
CB
CC
Push pull

⇒ The symbol in figure is
SUS
SBS
Shockley diode
UJT

⇒ Consider the following sets of values of E, R and C for the circuit in the given fig
1 and 4
1 and 2
3 and 4
2 and 3

⇒ Consider the following statements:

Race around condition can occur in JK flip flop when both inputs are 1
A flip flop is used to store one bit of information
A transparent latch is a D type flip flop
Master slave flip flop is used to store two bits of information

Which of the above are correct?
1, 2, 3
1, 3, 4
1, 2, 4
2, 3, 4

⇒ Let f(A, B) = A ⊕ B; then the simplified form of the function f(f(x ⊕ y, z)w) is
(x ⊕ y ⊕ z)w
x ⊕ y ⊕ z ⊕ w
(x ⊕ y ⊕ z) + w
none of these

⇒ The impulse response h(t) of a linear invariant continuous time system is given by h(t) = exp (- 2t) u(t), where u(t) denotes the unit step function. The output of this system to the sinusoidal input x(t) = 2cos(2t) for all time t, is
0
2^-0.25 cos (2t - 0.125p)
2^-0.5 cos (2t - 0.125p)
2^-0.5 cos (2t - 0.25p)

⇒ HVDC transmission systems generally use
12 pulse converters
6 pulse converters
3 pulse converters
either 12 or 6 pulse converters

⇒ The trapezoidal pattern of figure is obtained when examining an AM wave by an oscilloscope. Modulation factor of the wave
0.33
0.5
2
1

⇒ In a tuned class C power amplifier the quiescent value of collector to emitter voltage is equal to (V_CC denotes collector battery voltage)
V_CC
0.5 V_CC
0.25 V_CC
either (b) or (c)

⇒ Spontaneous polarization occurs in ferroelectric materials.
TRUE
FALSE

⇒ For measurement of high voltage capacitors the suitable bridge is
Wien bridge
modified De Sauty bridge
Schering bridge
either (a) or (b)

⇒ Which of the following characters is allowed in variable names in C?
comma
dot
blank
underscore

⇒ The amplifier used in bootstrap voltage sweep should have a gain of
1
+∞
-1
-∞

⇒ In a hi-fi system the frequency response over the audio frequency range should be within
± 10 dB
5 dB
2 dB
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⇒ In a decimal digital computer, the number 127 is stored
1111111
0001 00100111
10001
11000111

⇒

Match the following:

	List I		List II
A.	Evanescent wave	1.	Pattern multiplication
B.	Skip distance	2.	Mismatched transmission line
C.	Return loss	3.	Propagation in lossy medium
D.	Antenna array	4.	Short wave propagation
		5.	Propagation below cut-off

A-5, B-2, C-4, D-3
A-2, B-4, C-1, D-5
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A-1, B-3, C-4, D-5

⇒ For stable network, the real part of poles and zeros of driving point function must be
negative
negative or zero
zero
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⇒ For the network shown below, the Thevenin voltage and R_TH is equal to _______
0 V, 58.82 Ω
0 V, 96.774 Ω
0 V, 3 KΩ
None of these

⇒ Which of the following circuit has the greatest bandwidth?
f_r = 455 MHz; Q = 10
f_r = 455 MHz; Q = 100
f_r = 1 MHz; Q = 100
f_r = 1 MHz; Q = 10