Communication Systems
Which of the following does not cause losses in optical fibre cables?

Attenuation in glass
Stepped index operation
Impurities
Microbending

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Communication Systems
Assertion (A): In FM the frequency of the carrier is varied by the modulating voltageReason (R): FM and PM are two forms of angle modulation.

A is correct but R is wrong
A is wrong but R is correct
Both A and R are correct but R is not correct explanation of A
Both A and R are correct and R is correct explanation of A

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