Question

A future space station in orbit about the earth is being powered by an electromagnetic beam from the earth.  The beam has a cross-sectional area of 135m²and transmits and average power of 1.20*10⁴W.   [20pts]

What is the intensity of this beam?

What is the maximum value of the electric field?

What is the maximum value of the magnetic field?

Answer 1

As per data given in question-

Area = 135 m²

Power =  1.20 * 10⁴ W

Part A)-

Intensity = Power / Area

I = 1.20*10⁴ / 135

I = 88.89 W/m²

Part B)-

Max. Value of E =

Emax =

Emax = 0.212 * 10⁴ N/C

Part C)-

Bmax = P* / Emax

Bmax = 1.20*10⁴ * 4*10^-7 / 0.212*10⁴

Bmax = 71.130 * 10^-7 T

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