Question 2 :
According to Maxwell's hypothesis, a changing electric field gives rise to

Question 3 :
In electromagnetic wave, according to Maxwell, changing electric field gives _______.<br/>

Question 5 :
If the directions of electric and magnetic field vectors of a plane electromagnetic wave are along positive $y$-direction and positive $z$-direction respectively, then the direction of propagation of the wave is along:

Question 6 :
Which wave characteristic describes the product of the frequency and the wavelength?

Question 9 :
The displacement current flows in the dielectric of a capacitor when the potential difference across its plates<br>

Question 11 :
In an electromagnetic wave,<br/>$E = 1.2\sin (2\times 10^{-6} t - kx)N/C$.<br/>Find value of intensity of magnetic field.<br/>$4\times 10^{-8} field.$

Question 12 :
A plane electromagnetic wave of frequency $50MHz$ travels in free space along the positive x-direction. At a particular point in space and time, $\overrightarrow{E} = 6.3\hat{j}V/m$. The corresponding magnetic field $\overrightarrow{B}$, at that point will be:

Question 13 :
<div>Maxwell's four equations are written as</div><div>(i) $\oint { \overrightarrow { E } .\overrightarrow { d } s } =\cfrac { { q }_{ 0 } }{ { \varepsilon }_{ 0 } } \quad $</div><div>(ii)$\oint { \overrightarrow { B } .\overrightarrow { d } s } =0$</div><div>(iii)$\oint { \overrightarrow { E } .\overrightarrow { d } l } =\cfrac { d }{ dt } \quad \oint { \overrightarrow { B } .\overrightarrow { d } s } $</div>(iv)$\oint { \overrightarrow { B } .\overrightarrow { d } s } ={ \mu }_{ 0 }{ \varepsilon }_{ 0 }\cfrac { d }{ dt } \quad \oint { \overrightarrow { E } .\overrightarrow { d } s } $<div>Which of the above Maxwell's equations shows that electric field lines do not form closed loops?<br/></div>

Question 15 :
Light is an electromagnetic wave. Its speed in vacuum is given by the expression

Question 16 :
<i></i>Choose the correct answer from the alternatives given.<br/>A parallel plate capacitor with plate area $A$ and separation between the plates $d$ is charged by a constant current $I$. Consider a plane surface of area $\dfrac{A}{2}$ parallel to the plate and drawn between the plates. The displacement current through the area is :

Question 17 :
A pulse of light of duration $100\ ns$ is absorbed completely by a small object initially at rest. Power of the pulse is $30\ mW$ and the speed of light $3\times 10^8 m/s.$ The final momentum of the object is<br>

Question 18 :
If the magnetic field of a plane electromagnetic wave is given by (The speed of light $= 3\times 10^{8}/ m/s) B = 100\times 10^{-6} \sin \left [2\pi \times 2\times 10^{15} \left (t - \dfrac {x}{c}\right )\right ]$ then the maximum electric field associated with it is

Question 19 :
The electric fields of two plane electromagnetic plane waves in vacuum are given by<br/>$\vec{E_1}=E_0\hat{j}\cos(\omega t-kx)$ and $\vec{E_2}=E_0\hat{k}\cos(\omega t-ky)$<br/>At $t=0$, a particle of charge q is at origin with a velocity $\vec{v}=0.8c\hat{j}$ (c is the speed of light in vaccum). The instantaneous force experienced by the particle is:<br/>

Question 20 :
The incident intensity on a horizontal surface at sea level from the sun is about $1 kW m^{-2}$. Assuming that 50 per cent of this intensity is reflected and 50 per cent is absorbed, determine the radiation pressure on this horizontal surface (in pascals).<br/>