At a distance of 10 km from a radio transmitter, the amplitude of the E-field is 0.20 volts/meter. What is the total power emitted by the radio transmitter

The total power is          

Explanation:

From the question we are told that

     The distance is  

      The amplitude of the electric field is  

Generally the average intensity of the electromagnetic field from the radio transmitter is mathematically represented  as

Here c is the speed of light with value  

          is the permeability of free space with value  

So

=>        

Generally this intensity can also be mathematically represented as

=>                  

=>                  

=>                  

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )