MEDIUM
JEE Main
IMPORTANT
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For plane electromagnetic waves propagating in the +z-direction, which one of the following combinations gives the correct possible direction for E and B field respectively?

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Important Questions on Electromagnetic Waves

HARD
JEE Main
IMPORTANT
Match List I (Wavelength range of electromagnetic spectrum) with List II (Method of production of these waves) and select the correct option from the options given below the lists.
  List I   List II
(a) 700 nm to 1 mm (i) Vibration of atoms and molecules.
(b) 1 nm to 400 nm (ii) Inner shell electrons in atoms moving from one energy level to a lower level.
(c) < 10-3 nm (iii) Radioactive decay of the nucleus.
(d) 1 mm to 0.1 m (iv) Magnetron valve.
EASY
JEE Main
IMPORTANT
During the propagation of electromagnetic wave in a particular medium :-
EASY
JEE Main
IMPORTANT
The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is :
MEDIUM
JEE Main
IMPORTANT
A plane electromagnetic wave of frequency 50 MHz travels in free space along the positive x - direction. At a particular point in space and time, E=6.3 j^ V/m, The corresponding magnetic field B, at that point will be:
EASY
JEE Main
IMPORTANT
Arrange the following electromagnetic radiations per quantum in the order of increasing energy:
A:  Blue light
B:  Yellow light
C:  X-ray
D:  Radiowave
EASY
JEE Main
IMPORTANT
If microwaves, Xrays, infrared, gamma rays, ultraviolet, radio waves and visible parts of the electromagnetic spectrum are denoted respectively by MXIGUR and V the following is the arrangement in ascending order of the wavelength
EASY
JEE Main
IMPORTANT
Match List - I (Electromagnetic wave type) with List - II (Its association/application) and select the correct option from the choices given below the lists :
 
  List - I   List - II
(a) Infrared waves (i) To treat muscular strain
(b) Radio waves (ii) For broadcasting
(c) X - rays (iii) To detect fracture of bones
(d) Ultraviolet rays (iv) Absorbed by the ozone layer of the atmosphere
HARD
JEE Main
IMPORTANT

A plane electromagnetic wave travels in a medium of relative permeability 1.61 and relative permittivity 6.44. If magnitude of magnetic intensity is 4.5×10-2 A m-1 at a point, what will be the approximate magnitude of electric field intensity at that point ?

(Given : Permeability of free space μ0=4π×10-7 N A-2, speed of light in vacuum c=3×108 m s-1)