Related Questions

If the current gain of the amplifier is X, its voltage gain is Y, then its power gain will be
A $$\frac{{\text{X}}}{{\text{Y}}}$$
B X × Y
C X + Y
D X - Y
When negative voltage feedback is applied to an amplifier, its voltage gain ___________
A Is increased
B Is reduced
C Remains the same
D None of the above
The common mode voltage gain is
A smaller than differentail voltage gain
B equal to differential voltage gain
C greater than differential voltage gain
D none of the above
The closed-loop voltage gain of an inverting amplifier equal to
A The ratio of the input resistance to feedback resistance
B The open-loop voltage gain
C The feedback resistance divided by the input resistance
D The input resistance
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).
A H
B 12.6 H
C 13.6 H
D 14.6 H
Power gain in decibels is equal to voltage gain in decibels only when
A Input impedance is equal to output impedance
B Output impedance is zero
C Never
D Input impedance is zero
When either one of the inputs to the differential amplifier is equal to zero then it is said to be operated in
A Single ended mode
B Differential mode
C Non inverting mode
D Inverting mode
The gain of an amplifier with feedback is known as ___________ gain
A Resonant
B Open loop
C Closed loop
D None of the above
On selling a chair at 7% loss and a table at 17% gain, a man gains Tk 296. If he sells the chair at 7% gain and the table at 12% gain, then he gains Tk. 400. The actual price of the table is ---
A Tk. 2400
B Tk. 2200
C Tk. 1800
D Tk. 1600
If a transistor amplifier feeds a load of low resistance (e.g. speaker), then voltage gain will be ___________
A High
B Very high
C Moderate
D Low

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