Electrical Engineering Mcqs

If the crystal frequency changes with temperature, we say that crystal has___________temperature coefficient?

• (A)  Positive
• (B)  Zero
• (C)  Negative
• (D)  None of the above

Answer

Submitted By :Ali Uppal

An LC oscillator cannot be used to produce ____________frequencies?

• (A)  High
• (B)  Audio
• (C)  Very low
• (D)  Very high

Answer

Submitted By :Ali Uppal

In an LC transistor oscillator, the active device is___________?

• (A)  LC tank circuit
• (B)  Biasing circuit
• (C)  Transistor
• (D)  None of the above

Answer

Submitted By :Ali Uppal

An oscillator employs___________feedback?

• (A)  Positive
• (B)  Negative
• (C)  Neither positive nor negative
• (D)  Data insufficient

Answer

Submitted By :Ali Uppal

In a phase shift oscillator, we use____________RC sections?

• (A)  Two
• (B)  Three
• (C)  Four
• (D)  None of the above

Answer

Submitted By :Ali Uppal

The application where one would most likely find a crystal oscillator is____________?

• (A)  Radio receiver
• (B)  Radio transmitter
• (C)  AF sweep generator
• (D)  None of the above

Answer

Submitted By :Ali Uppal

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

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

Answer

Submitted By :Ali Uppal

The input impedance of a transistor connected in___________arrangement is the highest?

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

Answer

Submitted By :Ali Uppal

The value of ß for a transistor is generally____________?

• (A)  1
• (B)  less than 1
• (C)  between 20 and 500
• (D)  above 500

Answer

Submitted By :Ali Uppal

When current 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