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

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A transmitter supplies `9 kW` to the aerial when unmodulated. The power radiation when modulated to `40%` is
A. `5 kW`
B. `9.72 kW`
C. `10 kW`
D. `12 kW`
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Correct Answer - 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`
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