The closed-loop voltage gain of an inverting amplifier equal to

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 of a differential amplifier is equal to RC divided by

A

r_e

B

2r_e

C

$$\frac{{{{\text{r}}_{\text{e}}}}}{2}$$

D

2R_E

A non inverting closed loop op amp circuit generally has a gain factor

A

Less than one

B

Greater than one

C

Of zero

D

Equal to one

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

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

In order to get more voltage gain from a transistor amplifier, the transistor used should have ___________

A

Thin base

B

Thin collector

C

Wide emitter

D

None of the above

In an RC coupled amplifier, the voltage gain over mid-frequency range ___________

A

Changes abruptly with frequency

B

Is constant

C

Changes uniformly with frequency

D

None of the above

The closed-loop voltage gain of an inverting amplifier equal to

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