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Physics Ncert Solutions Class 12th Physics Class 12th Communication Systems

A signal containing multiple frequencies is shown in figure A. It is passed through 2 different filters and then outputs are shown in figure B & C.

Option 1 -

B corresponds to low pass filter and C to high pass filter.

Option 2 -

B corresponds to high pass filter and C to low pass filter.

Option 3 -

Both correspond to low pass filter

Option 4 -

Both correspond to high pass filter.

1 View | Posted 3 weeks ago

Asked by Shiksha User

1 Answer

Answered by

Vishal Baghel | Contributor-Level 10

3 weeks ago

Correct Option - 1

Detailed Solution:

Low pass filter will allow low frequency signal to pass while high pass filter allow high frequency to pass through

0 Upvotes 0 Downvotes

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According to question, we can write

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m (t) = A? sin ω? t {ω? = 2π×10? }
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Kindly consider the following figure

The amplitude of upper and lower side bands of A.M. wave where a carrier signal with frequency 11.21 MHz, peak voltage 15 V is amplitude modulate by a 7.7 kHz sine wave of 5 V amplitude are (a/10) V and ( b/10 ) V respectively. Then the value of a/b is _______.

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Amplitude of sidebands = µAc/2
Here µ = Am/Ac = 5/15 = 1/3
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A signal containing multiple frequencies is shown in figure A. It is passed through 2 different filters and then outputs are shown in figure B & C.

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