Question 1 :
What is the angle between the electric dipole moment and the electric field due to it on the axial line?

Question 2 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span><p>Total Electric flux at a point in an electric field is</p>

Question 4 :
The solid angle subtended by the total surface area of a sphere at the centre is :<br/>

Question 5 :
Electric field due to a point charge $q$ at distance $r$ has magnitude :<br/>

Question 7 :
If $\oint _{ s }^{&#160; }{ \overrightarrow { E } .\overrightarrow { d } s } =0$ over surface, then

Question 9 :
Negative electric flux indicates that electric lines of force are directed

Question 10 :
When a negative charge is taken at a height from earth's surface, then its potential energy:

Question 12 :
the number of electric field lines emerged out of 1 C charge is

Question 13 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span><p class="wysiwyg-text-align-left">The electric field due to a charge at a distance of $3m$ from it is $500 N/C$. The magnitude of the charge is$\left [ \dfrac{1}{4\pi \varepsilon _{0}}=9\times 10^{9}Nm^{2}/C^{2} \right ]$ :</p>

Question 14 :
<span>What is the ratio of electric field intensity at distance $5$ cm to that&#160;at $10$ cm from a point charge $Q$ in air?</span><br/>

Question 15 :
<span>The field due to a charge at a distance $x$ from it is $E$. When the distance is doubled, the intensity of the field would be:</span>

Question 16 :
A laser beam of pulse power ${ 10 }^{ 12 }W$ is focussed on an object of area ${ 10 }^{ -4 }{ cm }^{ 2 }$. The energy flux in $W/{ cm }^{ 2 }$ at the point of focus is

Question 17 :
&nbsp;A negative charge is placed at some point of the joining the two +Q charges at rest . The direction of motion of negative charge will depend upon the:

Question 18 :
A line formly changed eonducting sphere of $24 \,m$ diameter has a surface change density of $80.0 \,\mu c/m^2$.<br>(i) Find the charge on the sphere<br>(ii) What is the total electric flux learning the surface of the sphere?

Question 19 :
Two point charges $Q$ and $-2Q$ are separated some distance. If the electric field at $Q$ is $E$, the electric field at $-2Q$ is&nbsp;

Question 20 :
<p>A region contains both uniform electric field $\vec E$ and uniform magnetic field $\vec B$ . A charge particle&nbsp;</p>

Question 21 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span><p class="wysiwyg-text-align-left">In a region where intensity of electric field is&#160;<span class="wysiwyg-font-size-small">$5NC^{-1}$</span><span class="wysiwyg-font-size-xx-small"><span class="wysiwyg-font-size-xx-small"> </span></span><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">, $40$ lines of electric force are crossing&#160;</span></span><span>per square metre. The number of lines crossing&#160;</span><span>per square metre where intensity of electric field&#160;</span><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">is&#160;$10NC^{-1}$</span></span><i> </i><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">will be :</span></span></p>

Question 22 :
If the surface is placed parallel to the electric field, then&nbsp;

Question 23 :
The work done in rotating a dipole through ${ 180 }^{ \circ&#160; }$ from electric field direction is :<br/>

Question 24 :
<span>The force between two short electric dipole placed on the same axis at a distance <i><b>R</b></i><b>,</b> varies as?<br/></span>

Question 25 :
If the electric flux entering and leaving a closed surface are $6 \times 10^6$ and $9 \times 10^6 SI$ units respectively, then the charge inside the surface of permittivity of free space ${\omega}_0$ is