The electric field of a plane electromagnetic wave in vacuum is represented by.
Ex = 0, Ey = 0.5 Cos 2π X108 (t - x / c) N/C and Ez = 0
(a) What is the direction of propagation of electromagnetic wave?
(b) Determine the wavelength of the wave?
(c) Compute the component of associated magnetic field?
(c) Compute the component of associated magnetic field? [3]
State the condition under which a microwave oven heats up a food item containing water
molecules most efficiently.
Q. Why did Maxwell have to modify Ampere's circuital law?
1. 'Energy of an electromagnetic wave is equally shared between electric and magnetic fields'- explain your answer.
Q. The image of a candle formed by a convex lens is obtained on a screen. Will full size of the image be obtained if the lower half of the lens is pained completely opaque ?
Question 54 of 90
Air cored chokes are used for reducing high frequency ac because
1. air is free
2. air core has high permeability
3. with air core self inductance increases
4. with air core self inductance is not much
16) Questions Chapter Wise
c) A sphere of radius 'a' is made of insulating material and has a charge distributed uniformly throughout its volume. Let the charge density be . Find the field due to the charge for ra.
The electric field of a plane electromagnetic wave in vacuum is represented by.
Ex = 0, Ey = 0.5 Cos 2π X108 (t - x / c) N/C and Ez = 0
(a) What is the direction of propagation of electromagnetic wave?
(b) Determine the wavelength of the wave?
(c) Compute the component of associated magnetic field?
(a) What is the direction of propagation of electromagnetic wave?
(b) Determine the wavelength of the wave?
(c) Compute the component of associated magnetic field? [3]
30. Initial length ofawireis L and its area of cross section is A . The wire is elongated by applying a stress r within its elastic limit. Prove that the potential enero density in the wire due to elongation is
[Hint: Potential enero stored per unit volume of the wire ]
State the condition under which a microwave oven heats up a food item containing water
molecules most efficiently.