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In calculating output impedance of an amplifier the source is replaced by an open circuit. | |
A. | TRUE [Wrong Answer] |
B. | FALSE [Correct Answer] |
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Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
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voltage and power
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current and power
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⇒ In a 3 phase full converter the average load current is 150 A. The average thyristor current is
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⇒ In a JFET
gate source cut off voltage is equal to V_{DS}
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List I | List II | ||
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A. | Very low response at very high frequencies | 1. | Low-pass system |
B. | Over shoot | 2. | Velocity damping |
C. | Synchro-control transformer output | 3. | Natural frequency |
4. | Phase-sensitive modulation | ||
5. | Damping ratio |
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-31
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-11
⇒ The image frequency of a superheterodyne receiver is
independent of the frequency at which the receiver is tuned
always outside the operating range of the receiver
typical to FM receivers only
not rejected by the IF tuned circuits
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resistive
inductive
capacitive
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⇒ In terrestrial microwave links, the number of 'fades' per unit increases as
both the transmission and the distance between the antennas are increased
the transmission frequency is increased but the distance between the antennas is decreased
the transmission frequency is decreased but the distance between the antennas is increased
both the transmission frequency and distance between the antennas are decreased
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Reason (R): Peak factor of a sinusoidal wave is 1.414.
Both A and R are true and R is correct explanation of A
Both A and R are true and R is not the correct explanation of A
A is true but R is false
A is false but R is true
⇒ The microprograms provided by a manufacturer to be used on his microprogrammed computer are generally called
software
network
firmware
hardware
⇒ Rochelle salt is a ferroelectric material.
TRUE
FALSE
⇒ Characteristic wave impedance is
ε/μ
(ε/μ)^{1/2}
E_{x}/H_{y}
H_{y}/E_{x}
⇒ In figure the bridge is balanced when Z_{4}
120∠70°
187.5∠ - 10°
187.5∠ - 70°
333.3∠ - 70°
⇒ Under low level injection assumption, the infected minority carrier current for an extrinsic semiconductor is essentially the
diffusion current
drift current
recombination current
induced current
⇒ In a semi converter feeding a resistive load, the firing angle is a. Each thyristor conducts for
p radians
(p - a) radians
(p + a) radians
(p - 0.5 a) radians
⇒ The current distribution along a travelling wave antenna can be written in the form
f(z) = f_{0}e^{-jβz}
f(z) = f_{0} sin β_{z}
f(z) = f_{0}
f(z) = f_{0} cos (ωt - β_{z})
⇒ Eddy current loss is
proportional to frequency
independent of frequency
proportional to (frequency)^{2}
proportional to (frequency)^{3}
⇒ In a satellite system circular polarization is to be obtained. The antenna used is
parabolic
horn
log periodic
helical
⇒ A bipolar transistor is a __________ controlled devices whereas a FET is a __________ controlled devices.
current, voltage
current, current
voltage, current
voltage, voltage
⇒ Which one of the following is the correct sequence of the numbers represented in the series given below?
2, 3, 4, 5, 6......
2, 4, 6, 8, 10 .....
2, 4, 6, 10, 12......
2, 4, 6, 10, 16 .....
⇒ A computer program is used to read M and print the sum 2 + 4 + 6 + 8 +.........+ 2M. If M = 9 , the print out will show the number
9
18
90
100
⇒ The attenuation characteristics of a loaded line is similar to that of
low pass filter
high pass filter
band pass filter
band stop filter
⇒ If current is less than 20 mA and time of contact is very small, the effect of current on human body is likely to be temporary.
TRUE
FALSE
⇒ A balun provides an impedance transformation of
0.667361111111111
0.334027777777778
0.167361111111111
0.0840277777777778
⇒ To realize following function 'f'3
6
4
10
⇒
Assertion (A): A good algorithm should be fast, require minimal computer memory and time.
Reason (R): Many times an algorithm is prepared in the form of a flow chart.
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 R is wrong
A is wrong R is correct
⇒ Figure represen
Diode rectifier
Schottky diode
Varistor
None of the above
⇒ In C-language f- = 9 is equivalent to
f = -9
f = f - 9
f = 9 - 1
-f = 9