If the transmitted power is 100KW then the field at a distance ‘R’ is 60mV/m. Suppose if the transmitted power is reduced to 50KW then the field at same distance ‘R’ will be equal to ________(a) 50mV/m(b) 42mV/m(c) 45mV/m(d) 55mV/mThis question was posed to me during an interview.My question is taken from Linear Modulation in chapter Amplitude Modulation of Analog Communications

If the transmitted power is 100KW then the field at a distance ‘R’

1.	If the transmitted power is 100KW then the field at a distance ‘R’ is 60mV/m. Suppose if the transmitted power is reduced to 50KW then the field at same distance ‘R’ will be equal to ________(a) 50mV/m(b) 42mV/m(c) 45mV/m(d) 55mV/mThis question was posed to me during an interview.My question is taken from Linear Modulation in chapter Amplitude Modulation of Analog Communications
Answer» Correct answer is (B) 42mV/m Best EXPLANATION: SINCE, Field strength (E) is directly PROPORTIONAL to the square root of transmission power i.e. E ∝ √Pt. Thereforewhich gives x = 42mV/m

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