Question 2 :
The solid angle subtended by the total surface area of a sphere at the centre is :<br/>

Question 3 :
<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 4 :
When a negative charge is taken at a height from earth's surface, then its potential energy:

Question 5 :
the number of electric field lines emerged out of 1 C charge is

Question 6 :
<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 7 :
<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 8 :
Negative electric flux indicates that electric lines of force are directed

Question 9 :
<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 11 :
If $\oint _{ s }^{&#160; }{ \overrightarrow { E } .\overrightarrow { d } s } =0$ over surface, then

Question 14 :
Electric field due to a point charge $q$ at distance $r$ has magnitude :<br/>

Question 15 :
What is the angle between the electric dipole moment and the electric field due to it on the axial line?

Question 16 :
In a certain region of space, electric field is along the z-direction throughout. The magnitude of electric field is, however not constant but increases uniformly along the positive z-direction at the rate&nbsp;${10^5}\,V/m.$ The force and the torque experienced by a system having a total dipole moment equal to&nbsp;${10^{ - 7}}C - m$ in the negative z-direction is given by respectively.