Question 1 :
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 3 : <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 4 :
A charge q is located at the centre of a cube.The electric flux through any face is -
Question 5 :
A particle A has charge +q and a particle B has charge +4q. each having the same m . allowed to fall from rest through the same electric potential difference. the ratio of the speed of A to that of B will e
Question 7 :
The charges from one body can be Transferred to another body but the total charge of a system ...........<br>
Question 9 :
Electric charge is due to the loss or gain of .............
Question 10 :
 If E=0, at all points of a closed surface. The total charge enclosed by the surface is zero.
Question 11 :
An electric dipole is kept in a non-uniform electric field. It experiences
Question 12 :
Calculate the magnitude of the force between two electrons which are separated by a distance of $10^{-10}m$. If the magnitude of the charge is $10^{-19}C$ and Coulomb constant is $10^{10}N\;m^{2}/C^{2}$.
Question 13 :
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 14 :
The electric potential is $V=x^2-2x$. What us the electric field strength at $x=1?$
Question 16 :
The electric field intensity at a point near and outside the surface of a charged conductor of any shape is '${ E }_{ 1 }$'. The electric field intensity due to uniformly charged infinite thin plane sheet is '${ E }_{ 2 }$'. The relation between '${ E }_{ 1 }$' and '${ E }_{ 2 }$' is :
Question 17 :
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 18 :
In a region of space having a uniform electric field $E$, a hemispherical bowl of radius $r$ is placed. The electric flux $\phi$ through the bowl is
Question 19 :
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 20 :
Two electric dipoles of dipole moment $2 \space cm$ and $4 \space cm$ respectively are kept inside a cube of side $'a' \space m$. Total electric flux linked with the cube is (in SI units)
Question 23 :
A drop of oil of density $\rho$ and radius $r$ carries a charge $q$ when placed in an electric field $E$, it moves upwards with a velocity $v$. If ${\rho}_{0}$ is the density of air, $\eta $ be the viscosity of the air, then which of the following force is directed upwards?
Question 24 :
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 25 :
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 27 :
The specific charge of a proton is $9.6 \, \times \, 10^7 \, C \, kg^{-1}$ The specific charge of an alpha particle will be
Question 29 :
Two coils 'P' and 'Q' are separated by some distance. When a current of $3$ A flows through coil 'P', a magnetic flux of $10^{-3}$ Wb passes through 'Q'. No current is passed through 'Q'. When no current passes through 'P' and a current of $2$A passes through 'Q', the flux through 'P' is?
Question 30 :
On doubling the distance between particles while leaving all other factors the same will:<br/>
Question 31 : <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"><p class="wysiwyg-text-align-left">If $10$ million electrons are removed from a neutral body, then the charge on the body is :</p>
Question 32 : <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 33 :
Assertion: Sometime, a crackling sound is heard while taking off sweater during winters.
Reason: This is due to static electric charges.
Question 35 :
The electric field strength produced at a point some distance away from a source charge does NOT depend on:<br/>
Question 36 :
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 37 :
The ratio of electric force between two electrons to two protons separated by the same distance in air is:
Question 38 : <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 39 :
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 40 :
The ratio of electric force between two electrons to two protons separated by the same distance in air is
