Question 1 :
A body is brought near to a negatively charged gold leaf electroscope. If the divergence of leaves increases. What is the nature of charge on the body?
Question 2 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><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 3 :
On doubling the charge on one particle while leaving all other factors the same will:<br/>
Question 4 :
A charge + Q is located in space at the point $(x=1m,y=10m,z=5m)$. What is the total electric flux that passes through the yz-plane?
Question 7 :
The ratio of electric force between two electrons to two protons separated by the same distance in air is:
Question 9 :
<p class="wysiwyg-text-align-left">A charge $Q\  \mu C$ is placed at the centre of a cube. The flux coming out from any surface will be :<br/></p>
Question 10 :
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:
Question 11 :
Two conducting charged spheres $X$ and $Y$ having unequal charges are connected by the wire. Which of the following is true?
Question 12 :
A gold leaf electroscope is given a positive charge so that its leaves diverge. How is the divergence of leaves affected, when a negatively charged rod is brought near its disc?
Question 13 :
12 positive charges of magnitude q are placed on a circle of radius R in a manner that they are equallyspaced. A charge +Q is placed at the centre. If one of the charges q is removed, then the force on Q is
Question 16 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Number of electric lines of force emanating from $1C$ of positive charge in vacuum is :</p>
Question 18 :
What happens when two straws are individually rubbed with separate sheets of paper and are brought near to each other?
Question 19 :
Two infinite parallel metal planes, contain electric charges with charge densities $+\sigma$ and $-\sigma$ respectively and they are separated by a small distance in air. If the permittivity of air is $\varepsilon_{0}$ then, the magnitude of the field between the two planes with its direction will be:
Question 20 :
Eight dipoles of charges of magnitude $e$ are placed inside a cube. The total electric flux coming out of the cube will be
Question 21 :
Electric field at a distance r from infinitely long conducting sheet is proportional to :
Question 22 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">A force ‘F’ is acting between two charges in air. If the space between them be completely filled with a medium $K=4$, the force will be :</p>
Question 23 :
Negative electric flux indicates that electric lines of force are directed
Question 25 :
Find out on which of following factors does strength of the force between charged particles depend.<br/>
Question 27 :
The solid angle subtended by the total surface area of a sphere at the centre is :<br/>
Question 28 :
Some materials have electrons that are tightly bound to the nucleus and are not free to travel within the substance. These materials are called .............
Question 29 :
<p><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">A body has a total charge of <span class="wysiwyg-font-size-medium"><span class="wysiwyg-font-size-medium">$6.4\times  10^{-19}$<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">coulomb. It is :</p>
Question 30 :
 If E=0, at all points of a closed surface. The total charge enclosed by the surface is zero.