Electronics and Communication Engineering - Communication Systems

Why Electronics and Communication Engineering Communication Systems?

In this section you can learn and practice Electronics and Communication Engineering Questions based on "Communication Systems" and improve your skills in order to face the interview, competitive examination and various entrance test (CAT, GATE, GRE, MAT, Bank Exam, Railway Exam etc.) with full confidence.

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Where can I get Electronics and Communication Engineering Communication Systems Interview Questions and Answers (objective type, multiple choice)?

Here you can find objective type Electronics and Communication Engineering Communication Systems questions and answers for interview and entrance examination. Multiple choice and true or false type questions are also provided.

How to solve Electronics and Communication Engineering Communication Systems problems?

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.

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.


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.


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.


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.


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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