The problem of Electrostatic coupling in a transformer is acute at

Power amplifiers generally use transformer coupling because transformer per-mits

A

Cooling of the circuit

B

Impedance matching

C

Distortionless output

D

Good frequency response

In an acute angled Triangle, the number of acute angles is

A

1

B

2

C

3

D

4

In an RC coupling scheme, the coupling capacitor CC must be large enough ___________

A

To pass d.c. between the stages

B

Not to attenuate the low frequencies

C

To dissipate high power

D

None of the above

In RC coupling, the value of coupling capacitor is about ___________

A

100 pF

B

0.1 µF

C

0.01 µF

D

10 µF

The most costly coupling is ___________ coupling

A

RC

B

Direct

C

Impedance

D

Transformer

Transformer coupling is used for ___________ amplification

A

Power

B

Voltage

C

Current

D

None of the above

Transformer coupling can be used in ___________ amplifiers

A

Either power or voltage

B

Only power

C

Only voltage

D

None of the above

Transformer coupling is generally employed when load resistance is

A

Large

B

Very large

C

Small

D

None of the above

The purpose of RC or transformer coupling is to ___________

A

Block a.c.

B

Separate bias of one stage from another

C

Increase thermal stability

D

None of the above

The frequency response of transformer coupling is ___________

A

Good

B

Very good

C

Excellent

D

Poor

The problem of Electrostatic coupling in a transformer is acute at

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