Electrical Engineering Mcqs

The frequency response of transformer coupling is___________?

• (A)  Good
• (B)  Very good
• (C)  Excellent
• (D)  Poor

Answer

Submitted By :Ali Uppal

1 db corresponds to_____________change in power level?

• (A)  50%
• (B)  35%
• (C)  26%
• (D)  22%

Answer

Submitted By :Ali Uppal

The lower and upper cut off frequencies are also called_____________frequencies?

• (A)  Sideband
• (B)  Resonant
• (C)  Half-resonant
• (D)  Half-power

Answer

Submitted By :Ali Uppal

Transformer coupling provides high efficiency because___________?

• (A)  Collector voltage is stepped up
• (B)  resistance is low
• (C)  collector voltage is stepped down
• (D)  none of the above

Answer

Submitted By :Ali Uppal

Transformer coupling is used for__________amplification?

• (A)  Power
• (B)  Voltage
• (C)  Current
• (D)  None of the above

Answer

Submitted By :Ali Uppal

In an RC coupling scheme, the coupling capacitor CC must be large enough______________?

• (A)  To pass d.c. between the stages
• (B)  Not to attenuate the low frequencies
• (C)  To dissipate high power
• (D)  None of the above

Answer

Submitted By :Ali Uppal

When a multistage amplifier is to amplify d.c. signal, then one must use_____________coupling?

• (A)  RC
• (B)  Transformer
• (C)  Direct
• (D)  None of the above

Answer

Submitted By :Ali Uppal

In practice, voltage gain is expressed______________?

• (A)  In db
• (B)  In volts
• (C)  As a number
• (D)  None of the above

Answer

Submitted By :Ali Uppal

The final stage of a multistage amplifier uses______________?

• (A)  RC coupling
• (B)  Transformer coupling
• (C)  Direct coupling
• (D)  Impedance coupling

Answer

Submitted By :Ali Uppal

RC coupling is not used to amplify extremely low frequencies because____________?

• (A)  There is considerable power loss
• (B)  There is hum in the output
• (C)  Electrical size of coupling capacitor becomes very large
• (D)  None of the above

Answer

Submitted By :Ali Uppal