Question

If modulation index of an AM wave is increased from 1.5 to 2, then the transitted power ________

(a) remains same

(b) increases by 20%

(c) increases by 41%

(d) increases by 50%

I have been asked this question in exam.

My question is from Problems of AM in portion Amplitude Modulation of Analog Communications

Answer 1

Right choice is (c) increases by 41%

To explain I would say: When m=1.5, transmitted power

.

= 0.41 x 100

= 41%

Therefore,  there is an increase in total power by 41%.