Question 1 :
What happens when a charged balloon is placed near another balloon of the same charge?

Question 2 :
In a gold leaf electroscope, its stem is made up of:

Question 3 :
State whether true or false:<br/>Alcohol and ether are conducting liquids of electricity.&#160;<br/>

Question 4 :
The force acting between two point charges kept at a certain distance is $5$N. Now the magnitudes of charges are doubled and distance between them is halved, the force acting between them is _________ N.

Question 5 :
Two point charges $q$ and $-2q$ are placed some distance $d$ apart. If the electric field at the location of $q$ due to $-2q$ is $E$, than at the location of $-2q$ due to $q$ is ( No external Field is present )

Question 6 :
Which of the following statements are true:A: Charge cannot exist without mass but mass can exist without charge<br/>B: Charge is invariant but mass varies with velocity<br/>C: Charge is conserved but mass alone may not be conserved

Question 7 :
<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">$6.4\times&#160; 10^{-19}$<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">coulomb. It is :</p>

Question 11 :
Pulsars are.<br>I. Source of radio-waves.<br>II. Rapidly rotating neutron stars with intense magnetic field.<br>III. So compressed that electrons and protons are forced to combine to form neutrons.<br>Which combinations is correct?<br>

Question 12 :
Assertion: A positively charged particle always moves along the electric lines of forces. Reason: Force on a charged particle is tangential to the electric lines of force.

Question 13 :
The electric field just outside the surface of conductor of area $A$ and surface charge density $\sigma$ is given by

Question 15 :
A square current carrying loop is suspended in a uniform magnetic field acting in the plane of the loop. If the force on one arm of the loop is<b>F</b>, the net force on the remaining three arms of the loop is:

Question 16 :
Two bodies have equal charge $q$, where each is charged with two electrons. One electron is transferred from the first body to the second so that one body has one excess electrons and other has three excess electrons while maintaining the distance between the charges. Which of the following statements are correct?I.The amount of electrostatic charge has decreased<br/>II.The electrostatic force between the pith balls has decreased<br/>III.Both the electrostatic charge and force have decreased

Question 17 :
In a certain region of space, electric field is along z-direction throughout. The magnitude of electric field is, however, not constant but increases uniformly along the positive z-direction, at the rate of $10^5 NC^{-1}$ per metre. What is the torque experienced by a system having a total dipole moment equal to $10^{-7}$ C-m in the negative z-direction?

Question 18 :
The rod or stem of a gold leaf electroscope is made of

Question 19 :
If there is only one type of charge in the universe, then what is the flux to the entire universe.<br/>($\vec { E } \rightarrow $ Electric field, $\vec { ds } \rightarrow $ Area vector)

Question 20 :
An electron at rest is accelerated in a uniform electric field of strength E. It covers a distance x. The kinetic energy gained by the electron will be :

Question 21 :
Two infinitely long parallel conducting plates having surface charge densities$\displaystyle +\sigma$ and$\displaystyle -\sigma$respectively, are separated by a small distance. The medium between the plates is vacuum. If$\displaystyle { \varepsilon }_{ 0 }$is the dielectric permittivity of vacuum then the electric field in the region between the plates is:

Question 22 :
A point charge $Q(C)$ is placed at the origin. Find the electric flux of which an area $4\pi\ m^2$ on a concentric spherical shell of radius $R$

Question 23 :
A charge $Q$is located at the centre of a sphere of radius $R$. Calculate the flux going out through the surfaceof the sphere.

Question 24 :
If the charge $+Q$ is now at the centre of a cube of side $2l$, what is the total flux emerging from all the six faces of the closedsurface?

Question 25 :
Assertion: STATEMENT-1 : In a region where uniform electric field exists, the net charge within volume of any size is zero. Reason: STATEMENT-2 : The electric flux within any closed surface in a region of uniform electric field is zero.