Question

1. If bandwidth is the difference between the highest and lowest signals of a transmission, then this means that a signal with the lowest frequency of 10KHz and an upper frequency of 5MHz, has a bandwidth of _____KHz.

2. If a data signal bit rate is 5kbps, then at Harmonic 1 we would have a value of ______ Hz, at Harmonic 3 we would have a value of _____Hz, and at Harmonic 5 wed would have a value of ____ Hz.

3. The critical angle of a light beam in a fiber optic cable, is a property of the substance, and its value differs from one substance to another. True or False?

Answer 1

1.) If bandwidth is the difference between the highest and lowest signals of a transmission, then this means that a signal with the lowest frequency of 10KHz and an upper frequency of 5MHz, has a bandwidth of 4990   KHz.

Explanation-

As Bandwidth = upper frequency - lower frequency

= 5 MHz - 10 KHz

= 5*1000 KHz - 10 KHz

= 4990 KHz

2.) If a data signal bit rate is 5kbps, then at Harmonic 1 we would have a value of 625   Hz, at Harmonic 3 we would have a value of 1875  Hz, and at Harmonic 5 wed would have a value of 3125   Hz.

Explanation-

As frequency at 1st Harmonic = bit rate / 8

= 5* 1000 bps / 8

= 625 Hz

Frequency at 3rd Harmonic = 3 * 625 Hz = 1875 Hz

Frequency at 5th Harmonic = 5 * 625 Hz = 3125 Hz

3.) The critical angle of a light beam in a fiber optic cable, is a property of the substance, and its value differs from one substance to another. True or False?

Ans - True

Explanation - Critical angle of different substances are different and unique because light beam can incident at any angle while travelling from optically more dense medium to less dense medium.