Communication System Tutorial 1

A message signal whose peak amplitude is 5V amplitude modulates a carrier wave whose peak amplitude is 10V. Find the Vmax value

• 15V

• 10V

• 1.5V

• 5V

 

What is the total power supplied by an AM transmitter with a carrier power of 2500 W and modulation of 77 percent?

• 300W

• 3000W

• 3241.125W

• 3256.25W

A carrier wave of 1500V is amplitude modulated by an audio signal to produce 40% AM. What is the amplitude of the side band?

• 300V

• 150V

• 3 KV

• 1.5KV

The process of SUPERIMPOSING MESSAGE SIGNAL WITH CARRIER WAVE IS KNOWN AS:

• DEMODULATION

• ATTENUATION

• MODULATION

• DETECTION

What is the function of the receiver?

• Converts signal into electric form

• Reducing noise during transmission

• Operating on the received signal

• Converting the signal into a useful form

The frequency range of 300 khz to 3000 khz is known as

• Low frequency

• medium frequency

• high frequency

• very high frequency

The ______________________ signal gets changed during modulation process?

• carrier

• message

• input

• moulating

The frequency of a signal is 750 KHz. Calculate the wavelength.

• 40 m

• 40 cm

• 400 cm

• 400 m

For an AM Modulator with a carrier frequency 100KHz and maximum modulating signal frequency given by 5KHz, determine

the bandwidth

• 95 khz

• 105 khz

• 500 khz

• 10 khz

Find the total power required for transmitting a 100% modulated AM signal using a 1000W carrier signal.

• 1500 W

• 500 W

• 10 W

• 10000 W