Electrical Engineering Mcqs

When current feedback (negative) is applied to an amplifier, its output impedance ________________?

• (A)  Is increased
• (B)  Is decreased
• (C)  Remains the same
• (D)  None of the above

Answer

Submitted By :Ali Uppal

IC = [a / (1 – a )] IB + [___________ / (1 – a )?

• (A)  ICBO
• (B)  ICEO
• (C)  IC
• (D)  IE

Answer

Submitted By :Ali Uppal

Negative feedback is employed in __________________?

• (A)  Oscillators
• (B)  Rectifiers
• (C)  Amplifiers
• (D)  None of the above

Answer

Submitted By :Ali Uppal

The voltage gain of a transistor connected in common collector arrangement is____________?

• (A)  equal to 1
• (B)  more than 10
• (C)  more than 100
• (D)  less than 1

Answer

Submitted By :Ali Uppal

The voltage gain in a transistor connected in___________arrangement is the highest?

• (A)  common base
• (B)  common collector
• (C)  common emitter
• (D)  none of the above

Answer

Submitted By :Ali Uppal

A feedback circuit usually employs _________________ network?

• (A)  Resistive
• (B)  Capacitive
• (C)  Inductive
• (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

When a negative voltage feedback is applied to an amplifier, its bandwidth_____________?

• (A)  Is increased
• (B)  Is decreased
• (C)  Remains the same
• (D)  Insufficient data

Answer

Submitted By :Ali Uppal

The arrow in the symbol of a transistor indicates the direction of____________?

• (A)  electron current in the emitter
• (B)  electron current in the collector
• (C)  hole current in the emitter
• (D)  donor ion current

Answer

Submitted By :Ali Uppal

Emitter follower is a _______________circuit?

• (A)  Voltage feedback
• (B)  Current feedback
• (C)  Both voltage and current feedback
• (D)  None of the above

Answer

Submitted By :Ali Uppal