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# DC Pandey Electrostatics Solutions

DC Pandey Electricity and Magnetism Solutions Chapter 21 ‘Electrostatics’ have been prepared to help you understand the fundamental topics of electricity. This chapter of DC Pandey Physics Book Solutions covers all the important topics such as electric charge, conductors and insulators, charging of a body, coulomb’s law, electric field, electric potential energy, electric potential. You will learn about the relationship between the electric field and potential. Equipotential surfaces, electric dipole, Gauss’s Law, Electric field and potential caused due to a charged spherical shell and solid sphere.

There are 225 questions covered in this chapter put together in a set of three exercises namely, introductory exercises, AIEEE Corner (Now JEE Mains), and JEE Corner respectively. The questions in this chapter are arranged in 2 levels according to the increasing complexity of the problem. Solving these questions will give a clear idea about the type of questions asked in JEE that you must be aiming at. You can also refer to DC Pandey Electrostatics Solutions for Class 12 exams.

We have covered all the topics in DC Pandey Electricity and Magnetism Electrostatics Solutions for you in a question-answer format. Such an approach will help you to not only understand Electrostatics for Class 12 but also make you ready to face the national level competitive exam with a robust foundation. Our experts double-check the solutions to ensure 100% accurate answers which makes Instasolv a reliable platform.

## Important Topics for DC Pandey Electricity and Magnetism Solutions Chapter 21: Electrostatics

Electric Charge

An electric charge is a fundamental property of a substance because of which the substance experiences force when kept in an electromagnetic field. There are positive charges and negative charges. It should be noted that like charges repel one another and unlike charges attract one another.

Conductors and Insulators

Conductors allow free movement of electrons which carry a negative charge on their surface. This is why electricity can pass through the conductors.

Insulators inhibit the flow or free movement of electrons, which is why insulators cannot let electricity flow through them.

Coulomb’s Law

Using this law, we can define the force, F acting between two given charges q1and q2lying at a distance of measuring ‘r’. According to coulomb’s law, the force between these charges is directly proportional to the product of two charges and inversely proportional to the square of the distance between them. where k is the proportionality constant such that Electric Field

The electric field a vector, on top, is a vector quantity that exists at every point in space. The electric field in a position shows the force that would act on a unit positive test charge if put at that position.

The electric field is related to the electric force that acts on an arbitrary charge q by, Electric Potential Energy

Electric charges have fields around them and thus a charge has to do work if it intends to change its position. This work is the electric energy or the electric potential energy of the charge.

For conservative forces, work done on particle undergoing displacement can be expressed in terms of the potential energy function.

Electric Potential

Potential energy per unit charge is known as Electric Potential. Thus, the electrostatic potential at any point in an electric field is the potential energy, U per unit charge, q’ at that point. Electric potential is represented by letter V and is given as: Relation Between Electric Field and Potential

The electric field is the negative space derivative of electric potential.

Equipotential Surface

An equipotential surface is a surface with a constant value of the potential at all points on the surface.

Electric Dipole

An electric dipole is tagged as a pair of objects which possess equal & opposite charges, parted by a significantly small distance.

Gauss Law

Gauss’s law states that the net flux of an electric charge in a closed surface is directly proportional to the enclosed electric field. It is one of the four equations of Maxwell’s laws of electromagnetism.

Electric Field due to a Charged Spherical Shell

The electric field due to a charged spherical shell can be given as,

1. Outside the shell: Electric Field, Where q is the charge enclosed in the sphere, and r is the radius of the Gaussian spherical surface.
2. On the surface of the shell, where is the charge density on the surface of the sphere.
3. Inside the shell, E= 0.

Exercise Discussion for DC Pandey Electricity and Magnetism Solutions Chapter 21: Electrostatics

1. Introductory Exercises:
• There are questions about charges and the principles used in conductors and insulators in exercise 21.1.
• In exercise 21.2, the questions are based on Coulomb’s Law.
• In 21.3, there are questions based on the electric charge and applications of coulomb’s law.
• In exercise 21.4, you will get to solve questions based on the Electric Field.
• In exercise 21.5, questions are based on the electric potential and electric field lines.
• In exercises 21.6 to exercise 21.9, the questions have covered the topics such as Equipotential surfaces, electric dipole, Gauss’s Law, Electric field and potential caused due to a charged spherical shell and solid sphere.
1. AIEEE Corner (Now JEE):

The topics covered in these exercises include applications of the Gauss’s law, the potential and electric field caused by a spherical shell and solid sphere, equipotential surfaces besides covering the other topics in the subjective as well as objective format of questions.

1. JEE Corner:

The topics are covered through advanced level problems of the recurring patterns in JEE Main and JEE Advance in this exercise. Important topics such as equipotential surfaces, electric dipole, coulomb’s law, charged spherical shell are scoring in this exam and hence, are covered thoroughly in the exercise questions.

## Why Use DC Pandey Electricity and Magnetism Solutions Chapter  21: Electrostatistics by Instasolv?

• Instasolv experts have used simple language to prepare a set of precise answers for DC Pandey Electricity and Magnetism Solutions that can be directly used in preparation for your Class 12 exams.
• At Instasolv you will learn to manage time between the complex numerical problems to achieve the highest score.
• Your sincerity coupled with the assistance of our subject matter experts can fetch you good marks in JEE Mains and JEE Advanced.
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