Practice portal › Electromagnetic Waves › Maxwell's Equations and the Production of EM Waves
Asked in GSEB Board July 2017 · Sources: the accelerated charge and Hertz
Idea: the sentence sets the blank equal to a kinetic energy, so whatever fills it must itself be an energy.
In Hertz's transmitter the charge sloshes back and forth between the two spheres. While it moves it carries kinetic energy, and an accelerating charge radiates.
Everything the wave carries away has to come from that oscillating charge, so the energy of the electromagnetic wave matches the kinetic energy of the charges.
So the blank is energy.
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