Home
Class 12
PHYSICS
An EM wave radiates out waves from a dip...

An EM wave radiates out waves from a dipole antenta, with `E_0` as the amplitude of its electric field vector. The electric field `E_0` which transports significant energy from the source falls off is:

A

`1/r^3`

B

`1/r^2`

C

`1/R`

D

remains constant.

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

What is the relation between amplitudes of electric and magnetic field in free space for e.m. wave?

Write a relation between electric field at a point and its distance from a short dipole.

The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B_0 = 510 nT . What is the amplitude of the electric field part of the wave?

A plain electromagnetic wave travels in vacuum along the Y-direction. Write the the directions of its electric and magnetic field vectors.

In these question, a statement of asertion followed by a statement of reason is given .Choose the correct answer out of the following choices: Assertion and reason both are correct statements and reason is correct explanation for assertion. Assertion and reason both are correct statements but reason is not correct explanation for assertion. Assertion is correct statement but reason is wrong statement. Assertion is wrong statement but reason is correct statement. Assertion:The ratio of the amplitudes of elctric and mgnetic fields is constant and it is equal to velocity of the electromagnetic waves in free space. Reason:It is because, B_0= c E_0 .

Show that the ratio of electric and magnetic field is equal to velocity of light(i.e. e.m. wave)