Electromagnetic Waves

Topics in this chapter

• Displacement Current
• Generation and Nature
• Wave Properties
• Speed and Field Relations
• Electromagnetic Spectrum
• Spectrum Applications

Cheat sheet

Practice questions

1. Question 1Q-7B6337

   In an electromagnetic wave propagating through vacuum, the electric field, the magnetic field and the direction of propagation are:

   1. A.All parallel to one another
   2. B.Mutually perpendicular to one another
   3. C.E and B parallel, both perpendicular to propagation
   4. D.E along propagation, B perpendicular
   See the answer and solution
2. Question 2Q-B8E1D5

   The speed of electromagnetic waves in free space is given by:

   1. A.sqrt(mu0 * epsilon0)
   2. B.mu0 * epsilon0
   3. C.1 / sqrt(mu0 * epsilon0)
   4. D.epsilon0 / mu0
   See the answer and solution
3. Question 3Q-633763

   The ratio of the amplitude of the electric field E0 to the amplitude of the magnetic field B0 in an electromagnetic wave in vacuum equals:

   1. A.1
   2. B.c (speed of light)
   3. C.1/c
   4. D.c^2
   See the answer and solution
4. Question 4Q-FA7C7B

   The peak electric field of an electromagnetic wave in vacuum is 6 V/m. The peak value of its magnetic field is:

   1. A.2 x 10^-8 T
   2. B.6 x 10^8 T
   3. C.2 x 10^8 T
   4. D.1.8 x 10^9 T
   See the answer and solution
5. Question 5Q-AD6C35

   Which of the following lists the electromagnetic spectrum in order of increasing wavelength? [Previous Year NEET]

   1. A.Gamma rays, X-rays, ultraviolet, visible, infrared, microwaves, radio waves
   2. B.Radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays
   3. C.Visible, infrared, microwaves, radio, ultraviolet, X-rays, gamma
   4. D.Microwaves, radio waves, infrared, visible, gamma, X-rays, ultraviolet
   See the answer and solution