In an electromagnetic wave in free space, the root mean square value of the electric field is \(E_{\text{rms}} = 6~\text{V/m}\). The peak value of the magnetic field is:
1. \(2.83\times 10^{-8}~\text{T}\)
2. \(0.70\times 10^{-8}~\text{T}\)
3. \(4.23\times 10^{-8}~\text{T}\)
4. \(1.41\times 10^{-8}~\text{T}\)
Out of the following options which one can be used to produce a propagating electromagnetic wave?
1. | a stationary charge. |
2. | a chargeless particle. |
3. | an accelerating charge. |
4. | a charge moving at constant velocity. |
The electric and magnetic fields of an electromagnetic wave are:
1. | In phase and parallel to each other |
2. | In opposite phases and perpendicular to each other |
3. | In opposite phases and parallel to each other |
4. | In phase and perpendicular to each other |
An EM wave is propagating in a medium with a velocity \(\overrightarrow{{v}}={v} \hat{i}\). The instantaneous oscillating electric field of this EM wave is along the \(+y\) axis. The direction of the oscillating magnetic field of the EM wave will be along:
1. \(-z \text-\)direction
2. \(+z \text-\) direction
3. \(-y \text-\) direction
4. \(+y \text-\) direction
The velocity of electromagnetic wave is parallel to:
1.
2.
3.
4.
In an electric circuit, there is a capacitor of reactance 100 connected across the source of 220 V. The rms value of displacement current will be:
1. 2.2 A
2. 0.22 A
3. 4.2 A
4. 2.4 A
An electromagnetic radiation has an energy \(14.4~\text{keV}\). To which region of the electromagnetic spectrum does it belong?
1. | Infrared region |
2. | Visible region |
3. | X-ray region |
4. | \(\gamma\)- ray region |
Displacement current is the same as:
1. | Conduction current due to the flow of free electrons |
2. | Conduction current due to the flow of positive ions |
3. | Conduction current due to the flow of both positive and negative free charge carriers |
4. | It is not a conduction current but is caused by the time-varying electric field |
The charge of a parallel plate capacitor is varying as . Find the magnitude of displacement current through the capacitor.
(Plate Area = A, separation of plates = d)
1.
2.
3.
4.
In electromagnetic wave the phase difference between electric and magnetic field vectors is:
1. 0
2.
3.
4.