RC coupling is generally confined to low power applications because of

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 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

RC coupling is not used to amplify extremely low frequencies because

A

There is considerable power loss

B

There is hum in the output

C

Electrical size of coupling capacitor becomes very large

D

None of the above

___________ coupling is generally employed in power amplifiers

A

Transformer

B

RC

C

direct

D

Impedance

The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths:

A

0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 μm

B

2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 μm

C

4.2 to 5.0, 7.0 to 15.0 μm and 1 cm to 30 cm

D

All of these

Transformer coupling is generally employed when load resistance is

A

Large

B

Very large

C

Small

D

None of the above

What frequency range is used for TV transmission and low power microwave applications?

A

Very Low Frequency : 3 kHz to 30 kHz

B

Medium Frequency : 300 kHz to 3 MHz

C

Ultra High Frequency : 300 MHz to 3000 MHz

D

Super High Frequency : 3000 MHz to 30000 MHz

E

None of the above

A company produces five types of shirts -- A,B,C,D and E-using cloth of three qualities -- high, medium and low , using dyes of three qualities-- high, medium and low. One shirt requires 1.5 m of cloth .The following table gives respectively : The number of shirts (of each category) produced, in thousands. The percentage distribution of cloth quality in each type of shirt, and The percentage distribution of dye quality in each type of shirt. How many meters of low-quality cloth is consumed?

A

40,00 m

B

60,000 m

C

46,500 m

D

22,500 m

RC coupling is generally confined to low power applications because of

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