Additive Noise and Signal To Noise Ratio MCQ Quiz in मल्याळम - Objective Question with Answer for Additive Noise and Signal To Noise Ratio - സൗജന്യ PDF ഡൗൺലോഡ് ചെയ്യുക

Last updated on Apr 22, 2025

നേടുക Additive Noise and Signal To Noise Ratio ഉത്തരങ്ങളും വിശദമായ പരിഹാരങ്ങളുമുള്ള മൾട്ടിപ്പിൾ ചോയ്സ് ചോദ്യങ്ങൾ (MCQ ക്വിസ്). ഇവ സൗജന്യമായി ഡൗൺലോഡ് ചെയ്യുക Additive Noise and Signal To Noise Ratio MCQ ക്വിസ് പിഡിഎഫ്, ബാങ്കിംഗ്, എസ്എസ്‌സി, റെയിൽവേ, യുപിഎസ്‌സി, സ്റ്റേറ്റ് പിഎസ്‌സി തുടങ്ങിയ നിങ്ങളുടെ വരാനിരിക്കുന്ന പരീക്ഷകൾക്കായി തയ്യാറെടുക്കുക

Latest Additive Noise and Signal To Noise Ratio MCQ Objective Questions

Top Additive Noise and Signal To Noise Ratio MCQ Objective Questions

Additive Noise and Signal To Noise Ratio Question 1:

Two signals with the same bandwidth are received after passing through the same noisy channel. If the received signal amplitudes are 10 mV and 30 mV, then the one with better SNR is:

  1. Signal 1

  2. Signal 2

  3. Depends on the bandwidth of receiver

  4. Same for both

Answer (Detailed Solution Below)

Option 2 :

Signal 2

Additive Noise and Signal To Noise Ratio Question 1 Detailed Solution

Since, both the signals pass through the same receiver, the noise power at the output will be same for both the signals. As signal power is proportional to square of amplitude, the signal power will be more for the signal with amplitude 30 mV. Thus, the SNR will be better for signal 2.

Additive Noise and Signal To Noise Ratio Question 2:

A signal having a BW of 3 kHz is transmitted using DSB-SC. The channel has a noise PSD of No2=1010 W/Hz and it has attenuation loss of 50 dB. What is the required transmitted power (in kW) so that SN of the output is 60 dB.

Answer (Detailed Solution Below) 60

Additive Noise and Signal To Noise Ratio Question 2 Detailed Solution

S0N0=SiNi=60 dB=106

Ni=2×1010×3×103=6×107W

Si=6×101=0.6W

Channel attenuation =105

So Transmitted power required =105×0.6

input power=60 kW

Additive Noise and Signal To Noise Ratio Question 3:

Comprehension:

Consider the following Amplitude Modulated (AM) signal, where fm XAM (t) = 10 (1 + 0.5sin2πfmt) cos 2πfct

The AM signal gets added to a noise with power spectral density Sn(f) given in the figure below. The ratio of the average sideband power to mean noise power would be:-
69

  1. 25/8N0B

  2. 25/4N0B

  3. 25/2N0B

  4. 25/N0B

Answer (Detailed Solution Below)

Option 2 :

25/4N0B

Additive Noise and Signal To Noise Ratio Question 3 Detailed Solution

Mean noise power
Ratio of sideband to noise power is 6.25/ N0B = 25/4N0B

Additive Noise and Signal To Noise Ratio Question 4:

Comprehension:

Consider the following Amplitude Modulated (AM) signal, where fm XAM (t) = 10 (1 + 0.5sin2πfmt) cos 2πfct

The average side band power for the AM signal given above is :

  1. 25

  2. 12.5

  3. 6.25

  4. 3.125

Answer (Detailed Solution Below)

Option 3 :

6.25

Additive Noise and Signal To Noise Ratio Question 4 Detailed Solution

Average side band for A.M. is A2m2/4 = (100(1/4))/4 = 6.25 W

Additive Noise and Signal To Noise Ratio Question 5:

A radar receiver has a noise figure of 10 dB and a bandwidth of 2.5 MHz . The minimum power required for proper detection at room temperature (300 K) is

  1. 3.45×1015 W

  2. 1.38×1015 W

  3. 7.5×1015 W

  4. 93.15×1015 W

Answer (Detailed Solution Below)

Option 4 :

93.15×1015 W

Additive Noise and Signal To Noise Ratio Question 5 Detailed Solution

The minimum power required for proper detection is Pmin=kToΔf(F1) 

where k is Boltzmann constant.

Pmin=1.38×1023×300×25×106×9 W

Pmin=9.315×1014 W.

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