Electrical Engineering Mcqs

If the feedback fraction of an amplifier is 0.01, then voltage gain with negative feedback is approximately________________?

• (A)  500
• (B)  100
• (C)  1000
• (D)  5000

Answer

Submitted By :Ali Uppal

The gain of an amplifier with feedback is known as____________gain?

• (A)  Resonant
• (B)  Open loop
• (C)  Closed loop
• (D)  None of the above

Answer

Submitted By :Ali Uppal

In a transistor ______________?

• (A)  IC = IE + IB
• (B)  IB = IC + IE
• (C)  IE = IC – IB
• (D)  IE = IC + IB

Answer

Submitted By :Ali Uppal

Most of the majority carriers from the emitter____________?

• (A)  recombine in the base
• (B)  recombine in the emitter
• (C)  pass through the base region to the collector
• (D)  none of the above

Answer

Submitted By :Ali Uppal

In a transistor, the base current is about_________of emitter current?

• (A)  25%
• (B)  20%
• (C)  35 %
• (D)  5%

Answer

Submitted By :Ali Uppal

A transistor is a___________operated device?

• (A)  current
• (B)  voltage
• (C)  both voltage and current
• (D)  none of the above

Answer

Submitted By :Ali Uppal

Emitter follower is used for ________________?

• (A)  Current gain
• (B)  Impedance matching
• (C)  Voltage gain
• (D)  None of the above

Answer

Submitted By :Ali Uppal

In a transistor, signal is transferred from a___________circuit?

• (A)  high resistance to low resistance
• (B)  low resistance to high resistance
• (C)  high resistance to high resistance
• (D)  low resistance to low resistance

Answer

Submitted By :Ali Uppal

The gain of an amplifier without feedback is 100 db. If a negative feedback of 3 db is applied, the gain of the amplifier will become______________?

• (A)  5 db
• (B)  300 db
• (C)  103 db
• (D)  97 db

Answer

Submitted By :Ali Uppal

A transistor is connected in CB mode. If it is not connected in CE mode with same bias voltages, the values of IE, IB and IC will____________?

• (A)  remain the same
• (B)  increase
• (C)  decrease
• (D)  none of the above

Answer

Submitted By :Ali Uppal