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

An `EM` wave radiates out wards from a dipole antenna with `E_(0)` as the amplitude of its electric filed vector. The electric field `E_(0)` which transports significant energy from the source falls off as

A

`(1)/(r^(3))`

B

`(1)/(r^(2))`

C

`(1)/(r )`

D

remains constant

Text Solution

Verified by Experts

The correct Answer is:
C
A diode antenna radiates the electromagnetic waves out wards. The amplitude of electric field
`(E_(0))` which transports significant energy from the source falls intensity inversely as the distance `(r )` from the antenna i.e, `E_(0) prop (1)/(r )`
Promotional Banner

Topper's Solved these Questions

  • ELECTRO MAGNETIC WAVES

    NARAYNA|Exercise LEVEL- V|4 Videos

  • ELECTRO MAGNETIC WAVES

    NARAYNA|Exercise LEVEL- VI|5 Videos

  • ELECTRO MAGNETIC WAVES

    NARAYNA|Exercise LEVEL- III|10 Videos

  • ELECTRO MAGNETIC INDUCTION

    NARAYNA|Exercise Level-II (H.W)|23 Videos

  • ELECTROMAGNETIC INDUCTION

    NARAYNA|Exercise ASSERTION & REASON|6 Videos

Similar Questions

Explore conceptually related problems

An EM wave radiation outwards from a dipole antenna, with E_0 as the amplitude of its electric field vector. The electric field E_0 which transports signification energy from the source falls off as

In the EM wave the amplitude of magnetic fild H_(0) and the amplitude of electric field E_(0) at any place are related as

The intensity of light from a source is 500//pi W//m^(2) . Find the amplitude of electric field in the wave-

A lamp radiates power P_(0) uniformly in all directions, the amplitude of elctric field strength E_(0) at a distance r from it is

Draw a graph of electric field E(r) with distance r from the centre of the shell for 0 le r le 0 .

Electric field intensity (E) due to an electric dipole varies with distance (r) of the point from the center of dipole as :

At a far away distance r along the axis from a electric dipole electric field is E. Find the electric field at distance 2r along the perpendicular bisector.

The ratio of amplitude B_(0) and E_(0) of the magnetic electric fields associated with an electromagnetic wave is

The work in rotating electric dipole of dipole moment p in an electric field E through an angle theta from the direction of electric field, is: