Question 2 :
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 4 :
The displacement current flows in the dielectric of a capacitor when the potential difference across its plates<br>

Question 5 :
Identify which of the following is NOT a characteristic of electromagnetic waves?<br/>

Question 6 :
In electromagnetic wave, according to Maxwell, changing electric field gives _______.<br/>

Question 8 :
Choose the correct answer from the alternatives given.<br>The conduction current is the same as displacement current when the source is<br>

Question 10 :
Maxwell's corrections to Ampere's law was required when the later was extended to:<br>

Question 11 :
<span>Which of the following electromagnetic waves is used in medicine to destroy cancer cells?</span>

Question 13 :
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 $+$y axis. Then the direction of oscillating magnetic field of the em wave will be along.

Question 14 :
<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 :
<span>The ultra-high frequency band of radio waves in electromagnetic wave is used as in:</span>

Question 16 :
A parallel beam of light is incident normally on a plane surface absorbing 40 % of the light and reflecting the rest. If the incident beam carries 60 watt of power, the force exerted by it on the surface is:

Question 17 :
Light with an energy flux of $18 W/cm^2$ falls on a non-reflecting surface at normal incidence. The pressure exerted on the surface is:

Question 18 :
If a plane electromagnetic wave satisfies the equation $\dfrac{\partial ^2E_x}{\partial^2z}= C^2 \dfrac{\partial^2E_x}{\partial^2t},$the wave propagates in

Question 19 :
<div>The electric field part of an electromagnetic wave in vacuum is</div>$E=3.1\cos { \left[ \left( 1.8\dfrac { rad }{ m } \right) y+\left( 5.4\times { 10 }^{ 8 }\dfrac { rad }{ s } \right) t \right] \hat { i } } $.The frequency corresponding to the given part of the electromagnetic wave is?

Question 20 :
<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 :