Electrical Engineering Mcqs

An emitter follower has ______________input impedance?

• (A)  Zero
• (B)  Low
• (C)  High
• (D)  None of the above

Answer

Submitted By :Ali Uppal

The most commonly used semiconductor in the manufacture of a transistor is_____________?

• (A)  germanium
• (B)  silicon
• (C)  carbon
• (D)  none of the above

Answer

Submitted By :Ali Uppal

If voltage feedback (negative) is applied to an amplifier, its output impedance ______________?

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

Answer

Submitted By :Ali Uppal

The voltage gain of an emitter follower is _____________?

• (A)  Much less than 1
• (B)  Approximately equal to 1
• (C)  Greater than 1
• (D)  None of the above

Answer

Submitted By :Ali Uppal

The collector-base junction in a transistor has___________?

• (A)  forward bias at all times
• (B)  reverse bias at all times
• (C)  low resistance
• (D)  none of the above

Answer

Submitted By :Ali Uppal

A heat sink is generally used with a transistor to______________?

• (A)  increase the forward current
• (B)  decrease the forward current
• (C)  compensate for excessive doping
• (D)  prevent excessive temperature rise

Answer

Submitted By :Ali Uppal

When the graph between current through and voltage across a device is a straight line, the device is referred to as _______________?

• (A)  linear
• (B)  active
• (C)  nonlinear
• (D)  passive

Answer

Submitted By :Ali Uppal

The PIV rating of a crystal diode is _______________ that of equivalent vacuum diode

• (A)  the same as
• (B)  lower than
• (C)  more than
• (D)  none of the above

Answer

Submitted By :Ali Uppal

The leakage current in a crystal diode is due to _________________?

• (A)  minority carriers
• (B)  majority carriers
• (C)  junction capacitance
• (D)  none of the above

Answer

Submitted By :Ali Uppal

The reverse current in a diode is of the order of _____________?

• (A)  kA
• (B)  mA
• (C)  μA
• (D)  A

Answer

Submitted By :Ali Uppal