Question 2 :
What happens when a charged balloon is placed near another balloon of the same charge?
Question 3 :
The ratio of electric force between two electrons to two protons separated by the same distance in air is:
Question 4 :
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 5 :
State whether the given statement is True or False :Conductors when charged transfer all charges to the entire surface of the conductor. 
Question 8 :
A charge is kept at the centre of a shell. Shell has charge Q uniformally distibuted over its surface and radius R. The force on the central charge due to the shell is :
Question 9 :
<p><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">A body has a charge of <font size="3">$9.6 \times 10^{-20}$</font><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">coulomb. It is :</p>
Question 10 :
An electron is placed at the centre of a conducting sphere of radius $0.2$ metre having a uniform charge $5\times 10^{-2}$ coulomb. The force on the electron is :
Question 12 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p>Total Electric flux at a point in an electric field is</p>
Question 13 :
Assertion: Sometime, a crackling sound is heard while taking off sweater during winters.
Reason: This is due to static electric charges.
Question 14 :
Electric field at a distance r from infinitely long conducting sheet is proportional to :
Question 15 :
A potential difference of 5 V is applied across a conductor of length 10 cm. If drift velocity of electrons is $2.5 \times 10 ^{-4} m/s,$ then electron mobility will be
Question 17 :
When a glass rod is rubbed with silk cloth, it acquires positive charge because:
Question 18 :
Two point charges with charges  $3$ micro coulombs and $4$ micro coulombs are separated by $2$ cm.The value of the force between them?
Question 20 :
An electron (of charge $-e$) revolves around a long wire with uniform charge density $\lambda$ in a circular path of radius $r$. Its kinetic energy is given by:
Question 22 :
<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 23 :
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 24 :
Identify the conductors from the following: <br/>Eraser, paper, matchstick, copper wire, polythene.<br/>
Question 25 :
<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 26 :
What would happen to the electrostatic force between a pair of charged particles if both charges were tripled and the distance between them were also tripled?<br/>
Question 28 :
Two identical metallic spheres A and B of exactly equal masses are given equal positive and negative charge respectively. Then:
Question 29 :
The specific charge of a proton is $9.6 \, \times \, 10^7 \, C \, kg^{-1}$ The specific charge of an alpha particle will be