Which of the following measurements can be done using a counter?
| |
A. | 1 and 2 [Correct Answer] |
B. | 2 and 3 [Wrong Answer] |
C. | 1 and 4 [Wrong Answer] |
D. | 2 and 4 [Wrong Answer] |
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Explanation:-
Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
⇒ If sound intensity is 8 W/m^{2}, the dB level of this sound is about
5 dB
50 dB
129 dB
1290 dB
⇒ Assuming earth to be a sphere of radius 6400 km and height of a geosynchronous satellite above Earth as 36000 km, the velocity of a geosynchronous satellite is __________ km/hr.
28000
15000
36000
11100
⇒ The circuit in figure, the switched on at t = 0. After a long time the current through 5 Ω resistanc
0.0416666666666667
0.166666666666667
0.416666666666667
0
⇒
Assertion (A): In FM all power amplifiers can be operated in class C
Reason (R): FM is a constant amplitude modulation system.
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 correct but R is wrong
A is wrong but R is correct
⇒ V_{L} = 100 cos (10t + 30&d
116.57 sin (10t - 29°) V
116.57 sin (10t + 29°) V
117.00 sin (10t - 29°) V
117.00 sin (10t + 29°) V
⇒ The first column of a Routh arra
2
3
4
5
⇒ A Wien bridge oscillator uses
negative feedback
positive feedback
both negative and positive feedback
none of the above
⇒
Assertion (A): The Fourier series of the wave shown in the figure does not contain even harmao
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
⇒ In one's complement 8 bit representation 11111111 represents
0
0
1
-1
⇒ Decimal 1932 when converted into 10's complement will become
8868
8060
8608
8806
⇒ A variable resistance R and capacitive reactance X_{C} are connected in series. As R is varied, the locus of Z is
a straight line parallel to Y axis in 4th quadrant
a straight line parallel to X axis in 4th quadrant
a straight line parallel to Y axis in second quadrant
a straight line parallel to Y axis in first quadrant
⇒ In a forward biased p-n junction current enters p material as hole current and leaves n material as electron current of the same magnitude.
TRUE
FALSE
⇒ At very low temperatures, semiconducting materials behave as insulators.
TRUE
FALSE
⇒ If two mutually exclusive events A and B can happen in m and n ways, then either A or B can happen in (m + n) ways.
TRUE
FALSE
⇒ The circuit of figure is ca
current mirror
voltage mirror
impedance inversion
phase splitting
⇒ If f=0
X_{L} = 0 and X_{C} = 0
X_{L} = ∞, X_{C} = ∞
X_{L} = 0 and X_{C} = ∞
X_{L} = ∞ and X_{C} = 0
⇒ Which of the following can not be used as a variable name in C?
else
coal
ram
vendy
⇒ Which of the following pulse communication system is inherently immune to noise?
PPM
PCM
PWM
PAM
⇒ In ferromagnetic materials, the orientation between neighbouring permanent dipoles is parallel.
TRUE
FALSE
⇒ In a transistor the minimum and maximum values of β_{dc} are 100 and 121. The proper value of β_{dc} to be used to locate Q point is
100
121
110.5
110
⇒ At 0 K the forbidden energy gap in intrinsic semi conductor is about
10 eV
6 eV
1 eV
0.2 eV
⇒
List I (Properties) | List II (Relations) | ||
---|---|---|---|
A. | Linear but NOT time-invariant | 1. | y(t) = t^{2}x(t) |
B. | Time-invariant but NOT linear | 2. | y(t) = t |x(t)| |
C. | Linear and time invariant | 3. | y(t) = |x(t)| |
4. | y(t) = x(t - 5) |
A-1, B-3, C-4
A-2, B-3, C-4
A-3, B-1, C-2
A-1, B-2, C-3
⇒ The transmitting antennas for lower frequencies (below 500 kHz) are generally
vertical grounded wire type
horizontal suspended wire type
parabolic reflector type
any of the above
⇒ Speeds of sound and radio waves are equal.
TRUE
FALSE
⇒ With the switch in STOP position, Y will be equa
0
1
CLK
none of these
⇒
Match the following:
List I (Diode Rectifier) | List II (Efficiency is R_{f}/R_{L} = 0.25) | ||
---|---|---|---|
A. | Half wave | 1. | 0.54 |
B. | Bridge Rectifier | 2. | 0.65 |
C. | Full wave using tapped centre transformer | 3. | 0.325 |
A-1, B-2, C-3
A-2, B-1, C-3
A-3, B-2, C-1
A-3, B-1, C-2
⇒ All of the output pulses are at full transmitter power for a strong signal in all of the following except
PWM
PAM
PFM
PCM
⇒ In calculating output impedance of an amplifier the source is replaced by an open circuit.
TRUE
FALSE
⇒ In the above case the modulation index will be
9.6
28.8
57.6
100
⇒ If F_{n} represents Fourier series coefficient of f(t), then Fourier series coefficient of f(t + t) =
F_{n}e ^{-jω}_{0}^{t}
F_{n}e ^{jω}_{0}^{t}
F_{n}e ^{jnω}_{0}^{t}
F_{n}e ^{-jnω}_{0}^{t}