Question

A transmitter transmit a power of 10 KW when modulation is 50%. What is the power of carrier wave? 

(A) 12 KW 

(B) 7.0 KW 

(C) 8.89 KW 

(D) 5.0 KW

Answer 1

The correct option is (C) 8.89 KW.

Explanation:

Total power = carrier power [1 + (m² / 2)]

P_T = P_C [1 + (m² / 2)]

Given: m = 0.5

P_T = 10KW

 ∴ 10 = P_C [1 + {(0.5)² / 2)]

10 = P_C [1 + (1/8)]

∴  P_C = (80/9) = 8.89 KW