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• 11 years aieee chapterwise
• 10 Years CBSE Champion Chapterwise-Topicwise - Physics-Class- 12 - Thought Books
• 11 YEARS CBSE CHAMPION CHAPTERWISE TOPICWISE - PHYSICS
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X Electric potential due to a uniformly charged It is denoted by symbol V. X 4 pe0 r Electric potential due to group of charges : The electric potential at a point due to a group of ita — At a point inside the shell i.

The variation of V with r for a uniformly charged thin spherical shell is shown in the figure. X Electric potential at any point due to an electric dipole X Electric potential due to a non-conducting solid sphere of uniform volume charge density C. Electrostatic Potential and Capacitance X Electrostatic shielding : It is the phenomenon — Two equipotential surfaces can never of protecting a certain region of space from intersect one another.

A polar molecule has a permanent dipole moment e. Non-polar molecule : A non-polar molecule is yK 8 Electric potential energy one in which the centres of positive and negative X Electric potential energy of a system of two charges coincide. A non polar molecule has no permanent dipole moment. V to which it is raised. X The dimensional formula of capacitance is C. X The SI unit of electric potential energy is joule. They have a large Taking earth to be a conducting sphere of radius number of free charge carriers that are free to km, its capacity will be move inside the material.

It consists of — At the surface of a charged conductor, two conductors separated by an insulator or electric field must be normal to the surface dielectric. The two conductors carry equal and at every point. X Capacitance of a parallel plate capacitor with a dielectric slab of dielectric constant K, completely filled between the plates of the itacharges, there is absolutely no loss of charge.

Some energy is, however, lost in the process in the form of heat etc. It is given by X When a metallic conductor of thickness t is C. X When a dielectric slab of dielectric constant K where Q0 , C0 , V0 , E0 and U0 represents the is introduced in between the plates of a charged charge, capacitance, potential difference, parallel plate capacitor and the charging battery electric field and energy stored in the is disconnected, then capacitor of a charged air filled parallel plate — Charge remains unchanged i.

By means of a moving belt and E suitable brushes, charge is continuously i. Deduce an expression for the electric potential due to an electric dipole at any point on its axis. Name the physical quantity whose S. Is it a scalar or a vector quantity? Obtain the expression for the potential due to an in the figure.

Draw a plot showing the variation of i electric SA I 2 marks 9. Plot a graph comparing the variation of potential What is the electrostatic potential due to an Why are electric field lines perpendicular electric dipole at an equatorial point?

Derive the expression for the electric potential surface through a point is normal to the electric at any point along the axial line of an electric field. Delhi Delhi Figure shows the field lines on a positive charge. Is the work done by the field in moving a small positive charge from Q to P positive or negative? Give reasion. Sketch an equipotential Foreign surface due to electric field between the plates. If a particle of mass m and charge —q remains What is the geometrical shape of equipotential stationary between the plates, what is the surfaces due to a single isolated charge?

Delhi , AI C Delhi Two charges 2 mC and —2 mC are placed at points What is the amount of work done in moving a point charge around a circular arc of radius r ita b Are these surfaces equidistant from each other? If no, explain why? Delhi C yK at the centre of which another point charge is Can two equipotential surfaces intersect each located? Give reasons.

Delhi C AI C Two point charges 2 mC and —2mC are placed at points A and B, 6 cm apart. SA I 2 marks i Draw equpotential surfaces of the system. Deduce the relation between the Draw 3 equipotential surfaces corresponding electric field and the potential gradient between to a field that uniformly increases in magnitude them. Write the two important conclusions but remains constant along Z-direction.

How are concerning the relation between the electric these surfaces different from that of a constant C. Define an equipotential surface. Draw equipotential surfaces: i in the case of a single point charge and ii in a constant electric field in Z-direction. Why the equipotential surface about a Delhi C single charge are not equidistant? Depict the equipotential surfaces for a system between A and C. Draw the equipotential surfaces due to an Field electric dipole. Locate the points where the potential due to the dipole is zero. Write two properties of equipotential surfaces.

The equipotential point charge. Why do the equipotential surfaces of this field, are planes parallel to the surfaces get closer as the distance between the y-z planes. AI C ii How much torque would the dipole 2.

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Delhi C. Deduce the expression for the potential energy of a system of two point charges q1 and q2 brought A mC charge at the centre of a square of side 10 cm. Find the work done in moving a charge of 10 mC between two diagonally opposite points on the square. Why is the potential inside a hollow spherical of side 10 cm.

AI C charged conductor constant and has the same value as on its surface? Foreign How A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. What op. Show that the capacitance of a spherical respectively at r1 , r2 and r3 with respect to the common origin O. Delhi C conductor is 4pe0 times the radius of the spherical conductor. While travelling back to his residence in the car, q1, would the electric potential be zero. Pathak was caught up in a thunderstorm. It ii Also calculate the electrostatic potential became very dark.

He stopped driving the car energy of the system. Suddenly he noticed a child walking alone on the road. Two points charges 4Q, Q are separated by He asked the boy to come inside the car till the 1 m in air. At what point on the line joining the thunderstorm stopped. Pathak dropped charges is the electric field intensity zero? The boy insisted that Also calculate the electrostatic potential energy Dr. Pathak should meet his parents. Pathak for his AI concern for safety of the child.

Answer the following questions based on the 2. Both the capacitors have same plate response to Dr. Which line A or B corresponds to part in the past from everyday life. C1 and why? Delhi A. Distinguish between a dielectric and a V conductor? Distinguish between polar and non-polar dielectric. Immediatly after school hour, as Bimla with her friends came out, they noticed that there yM.