A 100 V carrier wave is made to vary between 160 V and 40 V by a modulating signal. What is the modulation index?

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Question: Answered & Verified by Expert

A

100 V

carrier wave is made to vary between

160 V

and

40 V

by a modulating signal. What is the modulation index?

PhysicsCommunication SystemJEE MainJEE Main 2019 (12 Jan Shift 1)

Options:

A $0.3$
B $0.6$
C $0.4$
D $0.5$

Solution:

1250 Upvotes Verified Answer

The correct answer is:

0.6

A_{C} = 100

A_{C} + A_{m} = 160

A_{C} - A_{m} = 40

A_{C} = 100, A_{m} = 60

μ = \frac{A_{m}}{A_{c}} = 0.6

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