magnetic field class 12 notes[PDF] || Electricity and Magnetism ||NEB||Physics||

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Magnetic Fields Explanation:

A magnetic field is a physical phenomenon that arises from the motion of electric charges. Whenever an electric charge moves, it generates a magnetic field around it, which can affect other moving charges in its vicinity. The strength and direction of the magnetic field depend on the properties of the charge that generates it, such as its magnitude, speed, and direction of motion.

Magnetic fields have a wide range of applications in our daily lives, from the operation of electric motors and generators to the functioning of electronic devices such as TVs and computers. They are also used in medical applications such as magnetic resonance imaging (MRI) and in the construction of particle accelerators used in research.

Magnetic fields are characterized by their strength, which is measured in units called teslas, named after the Serbian-American physicist Nikola Tesla. Earth's magnetic field, for example, has an average strength of about 50 microteslas, while the strongest magnetic fields produced by humans can reach up to several hundred teslas.

The behavior of magnetic fields is governed by several laws of physics, including Ampere's law, which describes the magnetic field generated by a current-carrying wire, and Faraday's law of induction, which explains how a changing magnetic field can induce an electric current in a nearby conductor. These laws form the basis for the design of many electrical and electronic devices, including transformers, electric motors, and generators.

One of the most intriguing properties of magnetic fields is their ability to influence the behavior of charged particles. In a magnetic field, charged particles such as electrons and protons will experience a force perpendicular to their direction of motion, causing them to move in a circular or spiral path. This effect is exploited in devices such as particle accelerators, where charged particles are accelerated to high speeds and directed along a circular path by a magnetic field.

Another important property of magnetic fields is their ability to shield objects from external electromagnetic radiation. This is because a magnetic field can deflect and absorb the energy of electromagnetic waves, preventing them from penetrating the object. This property is used in the design of shielding materials for electronic devices and in the construction of MRI machines, which use strong magnetic fields to image the internal structure of the human body.

In summary, magnetic fields are a fundamental aspect of the physical world, with a wide range of practical applications in science, technology, and medicine. Their behavior is governed by several laws of physics, and they have the ability to influence the behavior of charged particles and shield objects from electromagnetic radiation. Understanding the properties of magnetic fields is essential for the design and operation of many electrical and electronic devices, and for advancing our knowledge of the physical unit.

Summery:-

•A magnetic field is a physical phenomenon that arises from the motion of electric charges.

•Magnetic fields have a wide range of applications in our daily lives, from the operation of electric motors and generators to the functioning of electronic devices such as TVs and computers.

•Magnetic fields are characterized by their strength, which is measured in units called teslas.

•The behavior of magnetic fields is governed by several laws of physics, including Ampere's law and Faraday's law of induction.

•In a magnetic field, charged particles such as electrons and protons will experience a force perpendicular to their direction of motion, causing them to move in a circular or spiral path.

•Magnetic fields can shield objects from external electromagnetic radiation.

Here, you can find the complete notes magnetic field in PDF design.This pdf contains  definition of magnetic field, definition of magnetic field lines, properties of magnetic field lines, Right handed screw rule, Right hand thumb rule, Right hand first rule,Force on moving charge in magnetic field, Fleming left hand rule, explanation of Hall Effect, Explanation of Biot and Savart Rule, Application of Biot and Savart Rule.You can see and download every one of the arrangements in the PDF implant beneath:

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