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Electronics and Communication Engineering - Communication Systems

Why Electronics and Communication Engineering Communication Systems?

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You can easily solve all kind of Electronics and Communication Engineering questions based on Communication Systems by practicing the objective type exercises given below, also get shortcut methods to solve Electronics and Communication Engineering Communication Systems problems.

Home » Engineering » Electronics and Communication Engineering » Communication Systems » Section 1

Exercise :: Communication Systems - Section 1

1. 

A cordless telephone using separate frequencies for transmission in base and portable units is known as
A. duplex arrangement
B. half duplex arrangement
C. either (a) or (b)
D. neither (a) nor (b)

Answer: Option A

Explanation:

Separate frequencies for transmission from base and portable units allows two way transmission and is called duplex arrangement.

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2. 

For attenuation of high frequencies we should use
A. shunt capacitance
B. series capacitance
C. inductance
D. resistance

Answer: Option A

Explanation:

Since Xc for high frequencies is low, the high frequencies are shunted to ground and are not transmitted.

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3. 

A modem is classified as low speed if data rate handled is
A. upto 100 bps
B. upto 250 bps
C. upto 400 bps
D. upto 600 bps

Answer: Option D

Explanation:

When data rate in bits per second is upto 600, modem is low speed.

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4. 

VSB modulation is preferred in TV because
A. it reduces the bandwidth requirement to half
B. it avoids phase distortion at low frequencies
C. it results in better reception
D. none of the above

Answer: Option A

Explanation:

VSB (vestigial side band) transmission transmits one side band fully and the other side band partially thus, reducing the bandwidth requirement.

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5. 

A woofer should be fed from the input through a
A. low pass filter
B. high pass filter
C. band pass filter
D. band stop filter

Answer: Option A

Explanation:

Woofer is a low frequency loud speaker covering the range 16 Hz to 500 Hz.

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