The magnetic field in a plane EM wave traveling in the positive x-direction is given by
The equation for electric field is :
1. E=100sin [(2(t-x/c)]
2. E=(3)sin [(2(t-x/c)]
3. E=3sin [(2(t-x/c)]
4. E=100sin [(2(t-x/c)]
Statement I: A changing electric field produces a magnetic field.
Statement II: A changing magnetic field produces an electric field.
(1) If both statement-I and Statement-II are true, and Statement-II is the correct explanation of Statement-I.
(2) If both Statement-I and Statement-II are true but Statement-II is not the correct explanation of Statement-I.
(3) If Statement-I is true but Statement-II is false.
(4) If Statement-I is false but Statement-II is true.
Statement-I: Gamma rays are more energetic than X-rays.
Statement-II: Gamma rays are of nuclear origin but X-rays are produced due to sudden deceleration of high energy electrons while falling on a metal of high atomic number.
(1) If both statement-I and Statement-II are true, and Statement-II is the correct explanation of Statement-I.
(2) If both Statement-I and Statement-II are true but Statement-II is not the correct explanation of Statement-I.
(3) If Statement-I is true but Statement-II is false.
(4) If Statement-I is false but Statement-II is true.
The S.I. unit of displacement current is:
1. Henry
2. Coulomb
3. Ampere
4. Farad
The relation between electric field E and magnetic field intensity H in an electromagnetic wave is:
(1) E = H
(2)
(3)
(4)
An electromagnetic wave going through Vaccum is described by
(1)
(2)
(3)
(4) none of these
The ratio of for a plane electromagnetic wave has the dimension of
(1) Impedance
(2) Resistance
(3) Both
(4) None
If an electromagnetic wave going through a medium is given by;
\(E=E_{0}sin\left ( kx-\omega t \right )\) and \(B=B_{0}sin\left ( kx-\omega t \right ),\) then:
1. | |
2. | If the electric field is in the z-direction then the magnetic field should be in the -y direction |
3. | Both 1 and 2 are correct |
4. | Only 1 is correct |
A plane E M wave of frequency 25 MHz travels in free space in the x-direction. At a particular point in space and time then B at the point is
(1)
(2)
(3) 2.1
(4)
In an electromagnetic wave, the amplitude of electric field is 1 V/m. The frequency of wave is . The wave is propagating along Z-axis. The average energy density of electric field in joule/, will be
(1)
(2) 4.4
(3) 6.6
(4) 8.8