Question

The number of telephone conversations by a fibre of band width 40MHz, with much less intensity loss, are:

• A. 1800
• B. 2000
• C. 2200
• D. 2400

Answer 1

The correct option is B 2000

Bandwidth of Telephone conservation is around $2\times {10}^{4}Hz$

$\text{number of telephone conversations}=\frac{\text{Bandwidth of Fibre}}{\text{Bandwidth of Telephone conservation}}$

$\text{number of telephone conversations}=\frac{40\times {10}^6}{2\times {10}^4}=2000$

Hence option B is correct