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Question1

A commercial aircraft receives a homing radio signal with an intensity of 12 μW/m2 when it is 11 km from the transmitter.

a) What is the magnitude of the Pointing vector from the electromagnetic wave of this signal?

b) Assuming that the aircraft reflects the entire signal back along its path, what is the radiation pressure on the aircraft?

c) What is amplitude of the electric component of the signal?

d) What is amplitude of the magnetic component of the signal?

e) Assume transmitter radiates uniformly over a hemisphere, what is its transmission power?

Question2

A proton travels with the speed of 3.2×106 m/s at an angle 48 with a magnetic field of 0.71 T pointed in the +y direction. The mass of proton is 1.672 × 10-27 kg. What is magnitude of the magnetic force on the proton?

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