Electrical Engineering Mcqs

The collector of a transistor is____________doped?

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

Answer

Submitted By :Ali Uppal

A 10 V power supply would use ____________ as filter capacitor?

• (A)  paper capacitor
• (B)  mica capacitor
• (C)  electrolytic capacitor
• (D)  air capacitor

Answer

Submitted By :Ali Uppal

In a npn transistor,_____________are the minority carriers?

• (A)  free electrons
• (B)  holes
• (C)  donor ions
• (D)  acceptor ions

Answer

Submitted By :Ali Uppal

The input impedance of a transistor is___________?

• (A)  high
• (B)  low
• (C)  very high
• (D)  almost zero

Answer

Submitted By :Ali Uppal

The value of a of a transistor is_____________?

• (A)  more than 1
• (B)  less than 1
• (C)  1
• (D)  none of the above

Answer

Submitted By :Ali Uppal

____________ rectifier has the lowest forward resistance?

• (A)  solid state
• (B)  vacuum tube
• (C)  gas tube
• (D)  none of the above

Answer

Submitted By :Ali Uppal

The ripple factor of a half-wave rectifier is_________________?

• (A)  2
• (B)  1.21
• (C)  2.5
• (D)  0.48

Answer

Submitted By :Ali Uppal

The maximum efficiency of a half-wave rectifier is _____________?

• (A)  40.6 %
• (B)  81.2 %
• (C)  50 %
• (D)  25 %

Answer

Submitted By :Ali Uppal

For the same secondary voltage, the output voltage from a centre-tap rectifier is___________ than that of bridge rectifier?

• (A)  twice
• (B)  thrice
• (C)  four time
• (D)  one-half

Answer

Submitted By :Ali Uppal

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

• (A)  ICEO
• (B)  ICBO
• (C)  IC
• (D)  (1 – a ) IB

Answer

Submitted By :Ali Uppal