The instantaneous magnitudes of the electric field (E) and the magnetic field (B) vectors in an electromagnetic wave propagating in vacuum are related as

Question

The instantaneous magnitudes of the electric field (E) and the magnetic field (B) vectors in an electromagnetic wave propagating in vacuum are related as (A) E=(B/c) (B) E=c B (C) E=(B/c2) (D) E=c2 B

Tardigrade Admin · Accepted Answer

At every instant the ratio of the magnitude of the electric field to that of the magnetic field in an electromagnetic wave equals the speed of light.

Q. The instantaneous magnitudes of the electric field $(E)$ and the magnetic field $(B)$ vectors in an electromagnetic wave propagating in vacuum are related as

$E = \frac{B}{c}$

$E = c B$

$E = \frac{B}{c ^{2}}$

$E = c^{2} B$

At every instant the ratio of the magnitude of the electric field to that of the magnetic field in an electromagnetic wave equals the speed of light.

Q. The instantaneous magnitudes of the electric field (E) and the magnetic field (B) vectors in an electromagnetic wave propagating in vacuum are related as

E=cB​

E=cB

E=c2B​

E=c2B

At every instant the ratio of the magnitude of the electric field to that of the magnetic field in an electromagnetic wave equals the speed of light.

Q. The instantaneous magnitudes of the electric field $(E)$ and the magnetic field $(B)$ vectors in an electromagnetic wave propagating in vacuum are related as

$E = \frac{B}{c}$

$E = c B$

$E = \frac{B}{c ^{2}}$

$E = c^{2} B$