Question 1 :
Three large plates {tex} A , B {/tex} and {tex} C {/tex} are placed parallel to each other and charges are given as shown. The charge that appears on the left surface of plate {tex} B {/tex} is<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5d5fcec5e5db655bbf10a239"><br>

Question 2 :
In a given network the equivalent capacitance between {tex} A {/tex} and {tex} B {/tex} is {tex} \left[ C _ { 1 } = C _ { 4 } = \right. {/tex} {tex} \left. 1 \mu F , C _ { 2 } = C _ { 3 } = 2 \mu F \right] {/tex}<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5d5fceafe5db655bbf10a226"><br>

Question 3 :
Two concentric, thin metallic spheres of radii <b>R₁</b> and <b>R₂</b> <b>(R₁ > R₂)</b> bear charges <b>Q₁</b> and <b>Q₂</b> respectively. Then the potential at radius {tex} \mathrm {r} {/tex} between <b>R₁</b> and <b>R₂</b> will be

Question 5 :
What is the effective capacitance between X and Y ? <br><center><img style='object-fit:contain' src="https://data-screenshots.sgp1.digitaloceanspaces.com/5ead0959381c2135355c6aef.jpg" height="160"/></center>

Question 6 :
A rod of length 2.4{tex} \mathrm { m } {/tex} and radius 4.6{tex} \mathrm { mm } {/tex} carries a negative charge of {tex} 4.2 \times 10 ^ { - 7 } \mathrm { C } {/tex} spread uniformly over it surface. The electric field near the mid-point of the rod, at a point on its surface is

Question 7 :
A capacitor is charged to store an energy <b>U</b>. The charging battery is disconnected. An identical capacitor is now connected to the first capacitor in parallel. The energy in each of the capacitors is

Question 8 :
For distance far away from centre of dipole the change in magnitude of electric field with change in distance from the centre of dipole is

Question 9 :
Two identical particles each of mass m and having charge <b>-q</b> and <b>+q</b> are revolving in a circle of radius <b>r</b> under the influence of electric attraction. Kinetic energy of each particle is

Question 10 :
If {tex} E _ { a } {/tex} be the electric field strength of a short dipole at a point on its axial line and {tex} E _ { \mathrm { c } } {/tex} that on the equatorial line at the same distance, then

Question 12 :
An uniform electric field {tex} \mathrm { E } {/tex} exists along positive {tex} \mathrm { x } {/tex} -axis. The work done in moving a charge 0.5{tex} \mathrm { C } {/tex} through a distance 2{tex} \mathrm { m } {/tex} along a direction making an angle {tex} 60 ^ { \circ } {/tex} with {tex} \mathrm { x } {/tex} -axis is 10{tex} \mathrm { J } {/tex} . Then the magnitude of electric field is

Question 13 :
The electric field intensity just sufficient to balance the earth's gravitational attraction on an electron will be: (given mass and charge of an electron respectively are 9.1 X10^-31 kg and 1.6 X 10^-19 C)

Question 14 :
An electric dipole, consisting of two opposite charges of {tex} 2 \times 10 ^ { - 6 } \mathrm { C } {/tex} each separated by a distance 3{tex} \mathrm { cm } {/tex} is placed in an electric field of {tex} 2 \times 10 ^ { 5 } \mathrm { N } / \mathrm { C } {/tex} . Torque acting on the dipole is

Question 15 :
A particle of mass {tex} m {/tex} and charge {tex} q {/tex} is placed at rest in a uniform electric field {tex} E {/tex} and then released. The kinetic energy attained by the particle after moving a distance {tex} y {/tex} is

Question 16 :
Two identical metal plates are given positive charges <b>Q₁</b>, and <b>Q₂ < Q₁</b> respectively. If they are now brought close together to form a parallel plate capacitor with capacitance <b>C</, the potential difference between them is

Question 17 :
In the figure, the net electric flux through the area {tex} A {/tex} is {tex} \phi = \vec { E } \cdot \vec { A } {/tex} when the system is in air. On immersing the system in water the net electric flux through the area<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5d5fcd5406864d5bec7bea4e"><br>

Question 18 :
Two small similar metal spheres {tex} \mathrm { A } {/tex} and {tex} \mathrm { B } {/tex} having charges 4{tex} \mathrm { q } {/tex} and {tex} - 4 \mathrm { q } {/tex} , when placed at a certain distance apart, exert an electric force {tex} \mathrm { F } {/tex} on each other. When another identical uncharged sphere {tex} \mathrm { C } {/tex} , first touched with {tex} \mathrm { A } {/tex} then with {tex} \mathrm { B } {/tex} and then removed to infinity, the force of interaction between {tex} \mathrm { A } {/tex} and {tex} \mathrm { B } {/tex} for the same separation will be

Question 19 :
Two equally charged, identical metal spheres A and B repel each other with a force ‘F’. The spheres are kept fixed with a distance ‘r’ between them. A third identical, but uncharged sphere C is brought in contact with A and then placed at the mid point of the line joining A and B. The magnitude of the net electric force on C is

Question 20 :
Electric charge is uniformly distributed along a long straight wire of radius 1{tex} \mathrm { mm } {/tex} . The charge per {tex} \mathrm { cm } {/tex} length of the wire is Q coulomb. Another cylindrical surface of radius 50{tex} \mathrm { cm } {/tex} and {tex} \mathrm { d } {/tex} length 1{tex} \mathrm { m } {/tex} symmetrically encloses the wire. The total electric flux passing through the cylindrical surface is