TS EAMCET 2023 (Online) 13th May Evening Shift | Communication Systems Question 14 | Physics

A telephonic communication service is working at a carrier frequency of 20 GHz . Only $20 \%$ of it is utilised for transmission. If each channel requires a bandwidth of 5 kHz , then the number of telephonic channels that can be transmitted simultaneously are

$6 \times 10^5$

$2 \times 10^5$

$8 \times 10^5$

$4 \times 10^5$

TS EAMCET 2023 (Online) 13th May Morning Shift

MCQ (Single Correct Answer)

-0

The loss of strength of a signal while propagating through a medium is known as

modulation

demodulation

attenuation

noise

TS EAMCET 2023 (Online) 12th May Evening Shift

MCQ (Single Correct Answer)

-0

The need for modulation is

to increase the intensity of audio signal

to decrease the intensity of audio signal

to transmit audio signal to large distance

to increase the frequency of audio signal

TS EAMCET 2023 (Online) 12th May Morning Shift

MCQ (Single Correct Answer)

-0

A message signal of frequency 10 kHz is used to modulate a carrier wave of frequency 6 MHz , then the side band frequencies are

$6090 \mathrm{kHz}, 610 \mathrm{kHz}$

$5990 \mathrm{kHz}, 6010 \mathrm{kHz}$

$6000 \mathrm{~Hz}, 1000 \mathrm{~Hz}$

$6000 \mathrm{kHz}, 6100 \mathrm{kHz}$

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