A transmitter supplies 9 kW to the aerial when unmodulated. The power radiated when modulated to 40% is Options: A . &nbsp 5 kW B . &nbsp 9.72 kW C . &nbsp 10 kW D . &nbsp 12 kW E . &nbsp The 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

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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