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NTA Abhyas 2020

Exam: NTA Abhyas
Year: 2020
Subject: Physics
Chapter: Communication System

NTA Abhyas 2020 · Physics · Communication System

1% of 10 ^ 12 Hz of a satellite link was used for telephony. The...

1%

of

{10}^{12}Hz

of a satellite link was used for telephony. The number of channels or subscribers if each channel is of

8kHz

are

Options

A $2.5 \times {10}^{7}$
B $1.25 \times {10}^{6}$
C $2.5 \times {10}^{8}$
D $1.25 \times {10}^{8}$

Correct answer

B. $1.25 \times {10}^{6}$

Step-by-step solution

According to the question

1%

of

{10}^{12}Hz = {10}^{10}Hz

Number of channels

= \dfrac{{10}^{10}}{8 \times {10}^{3}} = 1.25 \times {10}^{6}

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