A carrier is amplitude modulated to a depth of 40%. The

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A carrier is amplitude modulated to a depth of 40%. The increase in power is—

1. 40%
2. 20%
3. 16%
4. 8%

Correct Option: D

Given,
μ = 40% = 0.4
We know that
Pt = Pc (1 + μ²/2)
Where,
P_t = Transmitted power
P_c = Carrier power
P_t = P_c (1 + 0·4²/2)
or
P_t = 1.08 P_C
Increase in power in percentage

=	P_t - P_c	× 100
	P_c

=	1.08P_t - P_c	× 100
	P_c

= 8%