NCERT Class 12 Physics Chapter 4 Moving Charges and Magnetism Notes (Handwritten Notes & PDF Download)

Physics is a very important subject for students. It may be hard for some students. For helping students here we have shared NCERT Class 12 Physics Chapter 4 Moving Charges and Magnetism Handwritten Notes.

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NCERT Class 12 Physics Chapter 4 Moving Charges and Magnetism Notes

Next Chapter: Magnetism and Matter
Previous Chapter: Current Electricity

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Class 12 Biology Notes
Class 12 Chemistry Notes

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Moving Charges and Magnetism Notes PDF

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Key Points: Moving Charges and Magnetism Notes PDF

Oersted’s experiment : According to oersted when electric current flows through a conducting wire then magnetic needle near it deflects and when flows of current is taken opposite then deflection of magnetic needle also becomes opposite. This Experiment is called Oersted’s experiment.

Ampere’s Swimming rule If a swimmer swims in the current direction While facing a magnetic needle, the north pole of the magnetic field deflects towards his left hand and the south pole towards his right hand according to Ampere’s swimming rule.

Magnet : The Substance which attract iron, nickel, Cobalt etc. magnetic substances is called magnet.

Magnetic field: The field around a pole up to where magnetic force is acting is called magnetic field.

• It is vector quantity.
• It is denoted by B.
• Its magnitude is equal to magnetic force acting at unit pole strength.

Maxwell right hand thum rule – It states that if we hold a straight current carrying conductor with our right hand such that the thumb points in the direction of the current then the curled fingers indicate the direction of the magnetic field lines.

Right hand screw Rule – It states that if we hold the screw in right hand in such a way that the direction of relation of screw is in the direction of current then the direction of million of screw gives the direction of magnetic field

Biot-Savart’s Law : When electric current flows through a conducting wire then magnetic field due to small length of the conductor is directly proportional to flowing current, small length and sine while inversely proportional to Square of distance.

Ampere circuital Law : It states that the line integral of magnetic field over a closed loop is equal to μ₀ times current enclosed.

Magnetic field due to hollow cylinder : A hallow cylinder is one to which any given current will distribute on the surface of Cylinder ie, there is no current inside the cylinder consider a hollow cylinder of radius R and carrying a current ‘I’

Magnetic field due to solid cylinder A solid cylinder is one which any given current will distribute uniformly over the whole cylinder. Consider a solid cylinder of radius ‘R’ and carrying current I.

Fleming’s left hand Rule : When thumb, forefinger and midfinger of left hand are kept perpendicular to each other and electric current flows along midfinger then direction of produced magnetic field will be along forefinger and magnetic force will be acts along thumb.

Radial Magnetic field: If the plane of coil is parallel to magnetic field then magnetic field is said to be radical.

Moving coil Galvanometer : The Instrument which measure the current in a circuit or the voltage drop across a resister is called moving ciol galvonometer.

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