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The antenna current. of an AM transmitte...

The antenna current. of an AM transmitter is `8A` when only carrier is sent but increases to `8.96 A` when the carrier is sinusoidally modulated. The percentage modulation is (Give answer in integer form)

A

`50% `

B

`60%`

C

`65% `

D

`71%`

Text Solution

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The correct Answer is:
D
`((I_t)/I_C)^2=1+m^2/2`
`implies ((8.96)/8)^2=1+m^2/2`
`m= 0.71 ` or 71%
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