JEE PHYSICS MCQ: ELECTROMAGNETIC WAVES

1 Medium

1 of 1

Application +4 | -1

In a uniform magnetic field of

{10^{ - 5}}T

in free space, the energy density is u. The electric field which will produce the same energy density in free space is

View answer and explanation

Correct option: B

3 \times {10^3}V/m

Option B (

3 \times {10^3}V/m

) is correct because it correctly equates the energy density of the magnetic field to the energy density of the electric field and solves for the electric field strength.

More Questions from ELECTROMAGNETIC WAVES

Practice All Chapter MCQs →

Statement I: Sound waves are not electromagnetic waves.

Statement II: Sound waves require a material medium for propagation. For a plane electromagnetic wave propagating in x-direction, which one of the following combination gives the correct possible directions for electric field

(E)

and magnetic field

(B)

respectively? Assertion: The relative velocity of two photons travelling in opposite directions is the velocity of light.

Reason: The rest mass of photon is zero Intensity of electromagnetic wave will be The rms value of the electric field of the light coming from the Sun is

720\;N/C

. The average total energy density of the electromagnetic wave is Methane is a greenhouse gas because