Noise & SNR MCQs

Practice Noise & SNR MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Communication SystemsNoise & SNR

Signal-to-noise ratio is defined as the ratio of?

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Correct Answer: A. Signal power to noise power

Explanation: SNR compares desired signal power with noise power, S/N.

Reference: Standard communication systems: noise & snr

Question 2

Communication SystemsNoise & SNR

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Correct Answer: B. 20 dB

Explanation: SNR=100/1=100. In dB, 10log10(100)=20 dB.

Reference: Standard communication systems: noise & snr

Question 3

Communication SystemsNoise & SNR

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Correct Answer: A. kTB

Explanation: Available thermal-noise power is N=kTB, where k is Boltzmann's constant, T is absolute temperature and B is bandwidth.

Reference: Standard communication systems: noise & snr

Question 4

Communication SystemsNoise & SNR

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Correct Answer: C. Double

Explanation: Since N=kTB, thermal-noise power is directly proportional to bandwidth.

Reference: Standard communication systems: noise & snr

Question 5

Communication SystemsNoise & SNR

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Correct Answer: B. 0 dB

Explanation: S/N=1, so SNR(dB)=10log10(1)=0 dB.

Reference: Standard communication systems: noise & snr