Calculation of modulation index using antenna current

Q.  The antenna current of the transmitter is 10A. Find the percentage of modulation when the antenna current increases to 10.4A.
- Published on 13 Oct 15

a. 32%
b. 28.5%
c. 64%
d. 40%

ANSWER: 28.5%
 
It = Ic √(1+ m2/2)
10.4= 10 √(1+ m2/2)
√ (1+ m2/2) = 1.04

Therefore m = 0.285
= 28.5%

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