Question 1 :
What happens when a charged balloon is placed near another balloon of the same charge?
Question 4 :
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 5 :
A gold leaf electroscope is given a positive charge so that its leaves diverge. How is the divergence of leaves affected, when a glass rod rubbed with silk is rolled on the disc of electroscope?
Question 6 :
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 8 :
State whether true or false :Gauss law is applicable only when there is a symmetric distribution of charge.
Question 9 :
A point charge $+q$ is placed at the centre of a cube of side L. The electric flux emerging from the cube is
Question 10 :
The solid angle subtended by the total surface area of a sphere at the centre is :<br/>
Question 11 :
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 12 :
What will be the nature of charge on the metal paper clip of electroscope when a positively charged body is brought in contact with it?
Question 13 :
State whether given statement is True or False :In conductors electric current can flow freely. <br/>
Question 15 :
Electric charge is due to the loss or gain of .............
Question 16 :
A charge q is located at the centre of a cube.The electric flux through any face is -
Question 17 :
Eight dipoles of charges of magnitude $e$ are placed inside a cube. The total electric flux coming out of the cube will be
Question 18 :
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 19 :
If a charge on the body is 1 nC, then how many electrons are present on the body?
Question 20 :
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 21 :
The force between two point charges placed in a material medium of dielectric constant $\varepsilon_r$ is $F$. If the material is removed, then the force between them becomes:
Question 22 : <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">The electric field at a point at a distance $r$ from an electric dipole is proportional to :</p>
Question 24 :
State whether the following statements are True or False.<br/>If E=0, at all points of a closed surface, The electric flux through the surface is zero.
Question 25 :
An electric line of force in the $xy-plane$ is given by equation $x^{2} + y^{2} = 1$. A particle with unit positive charge, initially at rest at the point $x = 1, y = 0$ in the $xy - plane$.
Question 26 :
Complete the following statements with an appropriate word /term be filled in the blank space(s).<br/>The force of attraction or repulsion between two charges is given by ......................<br/>
Question 27 :
The laws of forces that govern the force between two electric charges were discovered by :
Question 28 :
The velocity of proton is proportional to (where $v$ is frequency)
Question 30 :
Each of the two point charges are doubled and their distance is halved. Force of interaction becomes n times, where n is
Question 31 :
If $\oint _{ s }^{  }{ \overrightarrow { E } .\overrightarrow { d } s } =0$ over surface, then
Question 32 :
Negative electric flux indicates that electric lines of force are directed
Question 33 :
The charge on a body is +1 C. Find the number of electrons in excess or deficit on the body.
Question 34 :
Two metallic spheres, one hollow and the other solid, have same diameter. The hollow sphere will hold charge
Question 35 :
State whether the given statement is True or False :Conductors when charged transfer all charges to the entire surface of the conductor. 
Question 36 :
The mud houses are cooler in summer and warmer in winter. It happen due to the reason that.
Question 38 : <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">Two unlike charges attract each other with a force of 10N. If the distance between them is doubled, the force between them is :</p>
Question 40 :
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 41 :
Two charges $q_1$ and $q_2$, are separated by a distance r and apply a force F to each other. If both charges are doubled and the distance between them is also doubled, find out the new force between them ? <br/>
Question 42 :
In a region of space, the electric field is given by $\vec {E} = 8\hat {j} + 4\hat {j} + 3\hat {k}$. The electric flux through a surface of area of $100$ units in $x - y$ plane is?
Question 43 :
Assertion: A charge $q$ is placed on a height $h / 4$ above the centre of a square of side $b$. The flux associated with the square is independent of side length.
Reason: Gauss's law is independent of size of the Gaussian surface.
Question 44 : <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">A hollow metal sphere of radius $5 cm$ is charged such that the potential on its surface is $10 volts$. The electric field at the centre of the sphere will be           </p>
Question 45 :
An electron of mass m. initially at rest takes time $t_1$ to move a distances in a uniform electric field in the same field environment, a proton of mass mp initially at rest takes time $t_2$ to move the same distance (in the opposite direction). Ignoring gravity, the ratio $t_2/t_1$ is<br>
Question 46 :
When a negative charge is taken at a height from earth's surface, then its potential energy:
Question 48 :
Assertion: Gaussian surface is considered carefully.
Reason: The point where electric field to be calculated should be within the surface.
Question 50 :
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?
