Electrical Engineering Mcqs

Modulation is done in____________________

• (A)  Transmitter
• (B)  Radio receiver
• (C)  Between transmitter and radio receiver
• (D)  None of the above

Answer

Submitted By :Ali Uppal

In amplitude modulation, bandwidth is ____________ the audio signal frequency?

• (A)  Thrice
• (B)  Four times
• (C)  Twice
• (D)  None of the above

Answer

Submitted By :Ali Uppal

At 100% modulation, the power in each sideband is _____________ of that of carrier?

• (A)  50%
• (B)  40%
• (C)  60%
• (D)  25%

Answer

Submitted By :Ali Uppal

A 50 kW carrier is to be amplitude modulated to a level of 85%. What is the carrier power after modulation ?

• (A)  50 kW
• (B)  5 kW
• (C)  8 kW
• (D)  25 kW

Answer

Submitted By :Ali Uppal

As the modulation level is increased, the carrier power__________________?

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

Answer

Submitted By :Ali Uppal

A high Q tuned circuit will permit an amplifier to have high __________________?

• (A)  Fidelity
• (B)  Frequency range
• (C)  Sensitivity
• (D)  Selectivity

Answer

Submitted By :Ali Uppal

Man made noise are______________ variations?

• (A)  Amplitude
• (B)  Frequency
• (C)  Phase
• (D)  Both phase and frequency

Answer

Submitted By :Ali Uppal

If level of modulation is increased ______________ power is increased?

• (A)  Carrier
• (B)  Sideband
• (C)  Carrier as well as sideband
• (D)  None of the above

Answer

Submitted By :Ali Uppal

Demodulation is done in ________________?

• (A)  Receiving antenna
• (B)  Transmitter
• (C)  Radio receiver
• (D)  Transmitting antenna

Answer

Submitted By :Ali Uppal

In radio transmission, the medium of transmission is ________________?

• (A)  Space
• (B)  An antenna
• (C)  Cable
• (D)  None of the above

Answer

Submitted By :Ali Uppal