Electrical Engineering Mcqs

When a transistor is cut off _________________?

• (A)  Maximum voltage appears across transistor
• (B)  Maximum current flows
• (C)  Maximum voltage appears across load
• (D)  None of the above

Answer

Submitted By :Ali Uppal

If the zero signal dissipation of a transistor is 1W, then power rating of the transistor should be at least___________________?

• (A)  5 W
• (B)  33 W
• (C)  75 W
• (D)  1 W

Answer

Submitted By :Ali Uppal

The output stage of a multistage amplifier usually employs______________?

• (A)  Push-pull amplifier
• (B)  Preamplifier
• (C)  Class A power amplifier
• (D)  None of the above

Answer

Submitted By :Ali Uppal

The size of a power transistor is made considerably large to________________?

• (A)  Provide easy handling
• (B)  Dissipate heat
• (C)  Facilitate connections
• (D)  None of the above

Answer

Submitted By :Ali Uppal

The most costly coupling is _______________ coupling?

• (A)  RC
• (B)  Direct
• (C)  Impedance
• (D)  Transformer

Answer

Submitted By :Ali Uppal

A class A power amplifier uses _________________?

• (A)  Two transistors
• (B)  Three transistors
• (C)  One transistor
• (D)  None of the above

Answer

Submitted By :Ali Uppal

The output stage of a multistage amplifier is also called _________________-?

• (A)  Mixer stage
• (B)  Power stage
• (C)  Detector stage
• (D)  F stage

Answer

Submitted By :Ali Uppal

Class_____________ power amplifier has the highest collector efficiency ?

• (A)  C
• (B)  A
• (C)  B
• (D)  AB

Answer

Submitted By :Ali Uppal

The maximum efficiency of resistance loaded class A power amplifier is _________________?

• (A)  5%
• (B)  50%
• (C)  30%
• (D)  25%

Answer

Submitted By :Ali Uppal

________________ coupling is generally employed in power amplifiers?

• (A)  Transformer
• (B)  RC
• (C)  direct
• (D)  Impedance

Answer

Submitted By :Ali Uppal