Question 2 :
An electric dipole is kept in a non-uniform electric field. It experiences
Question 3 :
A plane area of $100\ {cm}^{2}$ is placed in uniform electric field of $100\ N/C$ such that the angle between area vector and electric field is $60^o$. The electric flux over the surface is
Question 4 :
Coulomb's law relates two charges and distance between them describing the electric force as being:
Question 7 :
A gold leaf electroscope is given a positive charge so that its leaves diverge. How is the divergence of leaves affected, when an uncharged rod is brought near its disc ?
Question 8 :
A positive charge $q$ is placed in a spherical cavity made in a positively charged sphere. The centers of sphere and cavity are displaced by a small distance $\vec {l}$. Force on charge $q$ is:<br>
Question 9 :
The ratio of electric force between two electrons to two protons separated by the same distance in air is
Question 10 :
Charging by friction is accompanied by loss or gain of electrons. State which body loses electrons when a glass rod is rubbed with silk.
Question 11 : <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Two spheres of equal mass A and B are given $+q$ and $-q$ charge respectively then:</p>
Question 12 :
Two charges are placed at certain distance apart. A metallic sheet is placed between them. What will happen to the force between the charges?
Question 13 :
On doubling the distance between particles while leaving all other factors the same will:<br/>
Question 14 :
State whether true or false :Electric field calculated by a Gauss law is the field due to only those charges which are enclosed inside the Gaussian surface.
Question 16 :
A small sphere of mass $m$ and electric charge $q$, is suspended by a light thread. A second sphere carrying a charge $q_2$ is placed directly below the first sphere at a distance $'d' $ away. Then :
Question 17 :
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 18 : <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">A charge q is enclosed in a cube at its geometrical centre. What is the electric flux associated with one of the faces of cube:</p>
Question 21 :
the number of electric field lines emerged out of 1 C charge is
Question 22 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">Another unit for the quantity having the unit $\dfrac{C^2 }{Nm^2}$ is:
Question 25 :
The inward and outward electric flux from a closed surface are respectively $ 8\times 10^{3}$ and $ 4\times 10^{3}$ units.Then the net charge inside the closed surface is
Question 26 :
Eight dipoles of charges of magnitude $e$ are placed inside a cube. The total electric flux coming out of the cube will be
Question 27 :
What is the angle between the electric dipole moment and the electric field due to it on the axial line?
Question 28 : <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 29 :
Three identical charges, each having a value $1.0 \times 10 ^ { - 3 } \mathrm { C }$are placed at the corners of an equilateral triangle of side 20 cm Find the potential at the center of the triangle
Question 30 :
A $1\ \mu A$ beam of proton with a cross-sectional area of $0.5\ sq. mm$ is moving with a velocity of $3\times 10^4\ ms^{-1}$. Then charge density of beam is
Question 31 :
A gold leaf electroscope is given a positive charge so that its leaves diverge. How is the divergence of leaves affected, when a positively charged rod is brought near its disc?
Question 32 :
A charge $q_1$ exerts a force of $45N$ on a charge of $q_{2}=10^{-5} C$ located at a point $0.2m$ from $q_{1}$. The magnitude of $q_{1}$ is
Question 33 :
Identify the conductors from the following: <br/>Eraser, paper, matchstick, copper wire, polythene.<br/>
Question 34 :
The specific charge of a proton is $\displaystyle 9.6\times { 10 }^{ 7 }C/kg$. The specific charge of an alpha particle will be:
Question 36 :
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 37 :
State whether given statement is True or False :In conductors electric current can flow freely. <br/>
Question 39 :
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 40 :
An electron and a proton are both released from rest 1 meter from a large stationary negative charge, considering only the force from the large stationary negative charge on the proton and electron. Which of the following is true?
Question 42 :
When a glass rod is rubbed with silk, the charge acquired by the silk is :<br><br>
Question 43 :
If the electric flux entering and leaving a closed surface are respectively of magnitude $\phi_{1}$ and $\phi_{2}$ then the electric charge inside the surface will be
Question 44 :
A point charge $+q$ is placed at the centre of a cube of side L. The electric flux emerging from the cube is
Question 45 :
A charged particle is accelerated by a potential of 200V. If its velocity is $8.4\times 10^8m/s$, then value of e/m for that particle in $C/kg$  is:
Question 47 :
In a gold leaf electroscope, its stem is made up of:
Question 49 :
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?
