The best frequency response is of ___________ coupling

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

The frequency response of transformer coupling is ___________

A

Good

B

Very good

C

Excellent

D

Poor

capacitors are used for audio frequency and radio frequency coupling and tuning.

A

Air

B

Mica

C

Plastic film

D

Ceramic

A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion.

A

Bode stability

B

Nyquist

C

Routh stability

D

None of these

According to Bode stability criterian, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is

A

0°

B

45°

C

90°

D

180°

The frequency generated by each decade in a direct frequency synthesizer is much higher than the frequency shown; this is done to

A

Reduce the spurious frequency problem

B

Increase the frequency stability of the synthesizer

C

Reduce the number of decades

D

Reduce the number of crystals required

RC coupling is used for ___________ amplification

A

Voltage

B

Current

C

Power

D

None of the above

Transformer coupling is used for ___________ amplification

A

Power

B

Voltage

C

Current

D

None of the above

The best frequency response is of ___________ coupling

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