A transmitter supplies 9 kW to the aerial when unmodulated. The power radiated when modulated to 40% is Options: A . &nbsp5 kW B . &nbsp9.72 kW C . &nbsp10 kW D . &nbsp12 kW E . &nbspThe frequency of modulated wave varies as frequency of carrier wave

Answer: Option B : B P t = P c [ 1 + m 2 2 ] = 9 [1 + ( 0.4 ) 2 2 ] = 9 [1 + 0.16 2 ] ( ∵ m = 40 % = 0.4) = 9 (1.08) = 9.72 kW

A transmitter supplies 9 kW to the aerial when unmodulated. The power radiated w

Question

A transmitter supplies 9 kW to the aerial when unmodulated. The power radiated when modulated to 40% is

Answer: Option B
:
B

P_{t}

P_{c} [1 + \frac{m^{2}}{2}]

= 9 [1 +

\frac{{(0.4)}^{2}}{2}

]
= 9 [1 +

\frac{0.16}{2}

] (

∵

m = 40 % = 0.4)
= 9 (1.08) = 9.72 kW

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