A stationary charge generates an electric field in its environment, and a moving charge generates a field in its environment that imposes a force on the moving charge. This field is referred to as the magnetic field, which is a vector quantity symbolised by the letter B.

**Table of Contents**show

## What is the name of Chapter 4 in physics class 12?

NCERT Solutions Class 12 Physics Chapter 4 Moving Charges and Magnetism.

## What are the important topics in moving charges and magnetism?

The important topics that are covered under the chapter on Moving Charges and Magnetism are listed as follows: Magnetic Field Caused by a Current Element, Biot-Savart Law. Magnetic Field and Magnetic Force. Ampere’s Circuital Law.

## How many chapters are there in magnetism Class 12?

Ans: There are 14 chapters in CBSE Class 12 Physics textbook. Some of the chapters with high marks weightage are Electrostatics and Current Electricity, Magnetic Effects of Current and Magnetism and Electromagnetic Induction and Alternating Currents, and Electromagnetic Waves and Optics.

## What is the value of mu not?

mu naught value: µ0 = 4π × 10-7 H/m.

## What is a cyclotron Class 12?

A cyclotron is a machine that accelerates charged particles or ions to high energies. It was invented to investigate the nuclear structure by E.O Lawrence and M.S Livingston in 1934. Both electric and magnetic fields are used in the cyclotron to increase the energy of the charged particles.

## What is the unit of magnetic field?

What is the unit of magnetic field? Magnetic field is denoted by B and H. The SI unit of H is amperes per metre and the SI unit of B is Newtons per metre per ampere or Teslas.

## What is Biot Savart law Ncert?

Biot savart law states that ” magnetic field due to a current carrying conductor at a distance point is inversely proportional to the square of the distance between the conductor and point, and the magnetic field is directly proportional to the length of the conductor, current flowing in the conductor”.

## What is a moving charge?

Any moving charge is an electric current, whether or not the charge is flowing through a material or not. Therefore, it is not unreasonable to expect to find a force on a charged particle moving through space.

## Is class 12 physics tough?

Most of the students find the Class 12 Physics subject difficult. This is also due to the vast syllabus and derivations that are there in both parts of the NCERT class 12 Physics book.

## Which chapter is most important in physics class 12?

- UNIT 1: Electrostatics.
- UNIT 2: Electricity in Use.
- UNIT 3: Magnetic Effects of Current and Magnetism.
- UNIT 4 Electromagnetic Induction and Alternating Current.
- UNIT 5: Electromagnetic waves.
- UNIT 6: Optics.
- UNIT 7: Radiation and Matter Have a Dual Nature.

## Which topics are removed from Physics 12?

- Magnetic field intensity due to a magnetic dipole (bar magnet) along its axis and perpendicular to its axis.
- Torque on a magnetic dipole (bar magnet) in a uniform magnetic field.
- Para-, dia- and ferro – magnetic substances, with examples.

## What are 4 properties of magnets?

- Magnets attract ferromagnetic materials.
- The magnet’s similar poles repel each other, whereas the opposite poles attract one other.
- A hung magnet always comes to rest facing north-south.
- The magnet’s poles are arranged in pairs. i.e. magnetic monopole doesn’t exist.

## How many lessons are there in 12th Ncert physics?

NCERT Physics textbook for Class 12, consists of a total of 15 chapters as per the latest syllabus prescribed by CBSE.

## What is K value?

The K value, also called the bending limit, of a cyclotron is the ratio between achievable energy and the charge-to-mass ratio according to. , where. is the kinetic energy of the particle, the atomic mass number and. the charge.

## What is the value of 4π?

The value of cos 4pi is 1. Cos 4pi can also be expressed using the equivalent of the given angle (4pi) in degrees (720°). Since the cosine function is a periodic function, we can represent cos 4pi as, cos 4pi = cos(4pi + n × 2pi), n ∈ Z.

## What is a Tesla unit of measure?

Tesla (T) – Magnetic Field Intensity Unit. Definition: The International System unit of field intensity for magnetic fields is Tesla (T). One tesla (1 T) is defined as the field intensity generating one newton (N) of force per ampere (A) of current per meter of conductor: T = N × A-1 × m-1 = kg × s-2 × A-1.

## What is Lorentz force explain?

Lorentz force, the force exerted on a charged particle q moving with velocity v through an electric field E and magnetic field B. The entire electromagnetic force F on the charged particle is called the Lorentz force (after the Dutch physicist Hendrik A. Lorentz) and is given by F = qE + qv × B.

## What is the spin of fermions?

In particle physics, a fermion is a particle that follows Fermi–Dirac statistics. Generally, it has a half-odd-integer spin: spin 1/2, spin 3/2, etc. In addition, these particles obey the Pauli exclusion principle.

## What is cyclotron frequency formula?

f=2πmqB.

## What is the formula of magnetic?

The magnitude of the force on a wire carrying current I with length L in a magnetic field is given by the equation. F=ILBsinθ where θ is the angle between the wire and the magnetic field. The force is perpendicular to the field and the current.

## What is a SI unit of flux?

The SI unit of magnetic flux is the Weber (Wb). A flux density of one Wb/m2 (one Weber per square metre) is one Tesla (T).

## What is the SI unit of magnetic charge?

where, N is Newton, the unit of force, C is Columb, the unit of electric charge and m/s is the unit of speed v. Hence, the unit of magnetic field is given as Tesla (T) which is equal to NA−1m−1.

## What does Lenz’s law state?

Lenz’s law, in electromagnetism, statement that an induced electric current flows in a direction such that the current opposes the change that induced it. This law was deduced in 1834 by the Russian physicist Heinrich Friedrich Emil Lenz (1804–65).

## What is another name for Biot Savart law?

Biot Savart law is also known as Laplace’s law or Ampere’s law. Consider a wire carrying an electric current I and also consider an infinitely small length of a wire dl at a distance x from point A.