Why Does an Accelerated Electric Charge Produce Energy?

[asdf1]

why does an accelerated electric charge produce energy?

 

[Tide]

Do you mean why does an accelerated charge radiate?

 

[asdf1]

yes, you're right~

 

[Meir Achuz]

This can only be seen in a detailed derivation of the radiation E and B fields.
See almost any intermediate or higher EM text.
The key point is that, for raditation, E and B fall off like 1/r instead of 1/r^2.
This follows from the use of the retarded time.
It turns out that if the velocity is constant, the retarded time does not result in the 1/r dependence.

 

[asdf1]

thanks! :)