Your friend who works at the college radio station must make electric-field meas
ID: 1472237 • Letter: Y
Question
Your friend who works at the college radio station must make electric-field measurements for a report to be filed with the station's application for license renewal. The measurement is made 4.6 km from the antenna, where your friend finds the electric field to be 380 mV/m . The station is allowed to broadcast with 55-kW power.
Part A
Your friend who works at the college radio station must make electric-field measurements for a report to be filed with the station's application for license renewal. The measurement is made 4.6 km from the antenna, where your friend finds the electric field to be 380 mV/m . The station is allowed to broadcast with 55-kW power.
Part A
Is the station broadcasting legally? Assume the power spreads equally in all directions. The station is broadcasting legally. The station isn't broadcasting legally.Explanation / Answer
The Poynting Vector provides us with power (P) radiated per area
P/4*pi*r^2 = 0*c*E^2
P = 4*pi*r^2 * 0*c*E^2 = 33.9 kW.
The station is broadcasting legally.
It is within stipulated power limits
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