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Assertion (A): In an op-amp the gain bandwidth product equals f_{finity} Reason (R): The change in open loop gain of an amplifier has almost no effect on closed loop gain | |
A. | Both A and R are correct and R is correct explanation for A [Wrong Answer] |
B. | Both A and R are correct but R is not correct explanation for A [Correct Answer] |
C. | A is correct R is wrong [Wrong Answer] |
D. | A is wrong R is correct [Wrong Answer] |
View Answer
Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
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It gives more output
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PCM
DM
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if line to line voltages are balanced
if line to line voltages are unbalanced
if line to line voltages are balanced or unbalanced
if degree of unbalanced in line to line voltages is small
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electrostriction
acousto-optic interaction
acousto-electric interaction
stimulated Brillouin scattering
⇒ In an ac circuit the fundamental component of current wave lags the corresponding voltage wave by 20°. The third harmonic component of current wave lags the corresponding voltage by an angle.
less than 20°
more than 20°
equal to 20°
equal to or more than 20°
⇒ For an ac sinusoidal wave, the rms value is 10 A. For the same wave delayed by 60° in each half cycle, the rms value is likely to be
0.416666666666667
7.07 A
6.35 A
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⇒ For holding the drain current constant in spite of large changes in JFET parameters
current source bias is used
voltage divider bias is used
reverse bias is used
no bias is used
⇒ In an intrinsic semiconductor, at a given temperature T
the number of electrons-hole pairs generated per second due to thermal motion are equal to the number of electron-hole pairs lost per second due to recombination
the number of electron-hole pairs generated per second due to thermal motion is always less than the number of electron-hole pairs lost per second due to recombination
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any of the above
⇒ For representing two sinusoidal voltages on a phasor diagram
Both voltages must be of the same frequency
Both voltages must be sinusoidal but may be of different frequencies
One of the voltages must be of 50 Hz
The frequency of one must be integral of that of other
⇒ The zener diode in the rectangular circuit shown in the figure has a zener voltage of 5.8 volts and a zener knee current of 0.5 mA. The maximum load current drawn from this circuit ensuring proper functioning over the input voltage range between 20 and 30 volts
23.7 mA
14.2 mA
13.7 mA
24.2 mA
⇒ A variable resistance R and capacitive reactance X_{C} are fed by an voltage. The current locus is
a semi circle in 4th quadrant
a semi circle in first quadrant
a straight line in 4th quadrant
a straight line first quadrant
⇒ Light dependent resistors are
highly doped semiconductor
intrinsic semiconductor
lightly doped semiconductor
either (a) or (c)
⇒ A generator with an internal resistance of 600 Ω drives an amplifier whose input resistance is 400 Ω. The generator's open circuit voltages is 1 mV; the amplifier develops 100mV across an 8kΩ load. The voltage multiplication is
25
50
125
250
⇒ A carrier wave carries information.
TRUE
FALSE