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JEE Main 20188 April
Exam
JEE Main
Year
2018
Date
8 April
Subject
Physics
Chapter
Communication System

JEE Main 2018 · 8 April · Physics · Communication System

A telephonic communication service is working at a carrier...

A telephonic communication service is working at a carrier frequency of 10GHz10GHz. Only 1010 % of it is utilized for transmission. How many telephonic channels can be transmitted simultaneously if each channel requires a bandwidth of 5kHz5kHz?

Options

  1. A2×1062 \times {10}^{6}
  2. B2×1032 \times {10}^{3}
  3. C2×1042 \times {10}^{4}
  4. D2×1052 \times {10}^{5}

Correct answer

D. 2×1052 \times {10}^{5}

Step-by-step solution

Number of telephonic channels that can be transmitted simultaneously,

=0.1×10×1095×103=2×105= \dfrac{0.1 \times 10 \times {10}^{9}}{5 \times {10}^{3}} = 2 \times {10}^{5}
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