If the electric field and magnetic field of an electromagnetic wave are related as $B = \frac{E}{c}$ where the symbols have their usual meanings and the energy in a given volume of space due to the electric field part is $U$ then the energy due to the magnetic field part will be:

\frac{U}{c}

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\frac{U}{c^{2}}

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\frac{U}{2}

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U

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Solution

The correct option is A $\frac{U}{c}$
Given the electric field and magnetic field of an electromagnetic wave are related as
$B = \frac{E}{c} . . . . . . . . . . . . . . (i)$
And also given the energy due to the electric field part is U
So eqn(i) becomes,
$B = \frac{E}{c} = \frac{U}{c}$
is the energy due to the magnetic field part.

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Similar questions

(U_{e})

(U_{m})

E_{0}

B_{0}

\to B = B_{x}^i + B_{y}^j + B_{z}^k

\to E = E_{r}^i + E_{y}^j + E_{z}^k

\to u = u_{x}^i + u_{y}^j + u_{z}^k

\to u \times \to B = 0

\to u \times \to E = 0

(U_{E})

(U_{B})

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