Electrical Engineering Mcqs

The base of a transistor is____________doped?

• (A)  heavily
• (B)  moderately
• (C)  lightly
• (D)  none of the above

Answer

Submitted By :Ali Uppal

At the base-emitter junctions of a transistor, one finds___________?

• (A)  a reverse bias
• (B)  a wide depletion layer
• (C)  low resistance
• (D)  none of the above

Answer

Submitted By :Ali Uppal

In a transistor if ß = 100 and collector current is 10 mA, then IE is___________?

• (A)  100 mA
• (B)  100.1 mA
• (C)  110 mA
• (D)  none of the above

Answer

Submitted By :Ali Uppal

The phase difference between the input and output voltages of a transistor connected in common emitter arrangement is___________?

• (A)  0o
• (B)  180o
• (C)  90o
• (D)  270o

Answer

Submitted By :Ali Uppal

The phase difference between the input and output voltages of a transistor connected in common collector arrangement is_____________?

• (A)  1800
• (B)  00
• (C)  900
• (D)  2700

Answer

Submitted By :Ali Uppal

When voltage feedback (negative) is applied to an amplifier, its input impedance _______________?

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

Answer

Submitted By :Ali Uppal

If the doping level of a crystal diode is increased, the breakdown voltage__________________?

• (A)  remains the same
• (B)  is increased
• (C)  is decreased
• (D)  none of the above

Answer

Submitted By :Ali Uppal

The ratio of reverse resistance and forward resistance of a germanium crystal diode is about ______________?

• (A)  1 : 1
• (B)  100 : 1
• (C)  1000 : 1
• (D)  40,000 : 1

Answer

Submitted By :Ali Uppal

A crystal diode has forward resistance of the order of ________________?

• (A)  kΩ
• (B)  Ω
• (C)  MΩ
• (D)  none of the above

Answer

Submitted By :Ali Uppal

A crystal diode is used as______________?

• (A)  an amplifier
• (B)  a rectifier
• (C)  an oscillator
• (D)  a voltage regulator

Answer

Submitted By :Ali Uppal