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TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A

12th Standard English Medium Physics Subject Magnetism and Magnetic Effects of Electric Current Book Back 2 Mark Questions with Solution Part - I

Published on: 01/06/2021

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Std: 12th Standard - Physics

chapter: - Book back Questions

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Questions:

Generic 2

5 x 2 = 10

Define ampere.

Compare dia, para and ferro-magnetism.

What is magnetic permeability?

What is magnetic susceptibility?

Define magnetic dipole moment.

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Answers Key:

Generic 2

5 x 2 = 10

One ampere is defined as that constant current when it is passed through each of the two infinitely long parallel straight conductors kept side by side parallely at a distance of one meter apart in vacuum causes each conductor to experience a force of 2 x 10^-7 newton per meter length of conductor.

sno	Dia magnetic materials	Para magnetic materials	Ferromagnetic materials
(i)	In diamagnetic materials each electron orbit has finite orbital magnetic dipole moment.	In paramagnetic materials each atom (or) molecule has net magnetic dipole moment.	The ferromagnetic materials have net dipole moment as in a paramagnetic material.
(ii)	Since the orbital planes are oriented in random manner, the vector sum of magnetic moments is zero.	Due to the random orientation of these magnetic moments, the net magnetic moment of the material is zero.	Within each domain, the magnetic moments are spontaneously aligned in a direction.
(iii)	The resultant magnetic moment for each atom is zero.	There is net magnetic dipole moment induced in the direction of the applied field.	Since the direction of magnetisation varies from domain to domain, net magnetisation of the specimen is zero.

Magnetic permeability is the measure of ability of the material to allow the passage of magnetic field lines through it.

Magnetic susceptibility is defined as the ratio of the intensity of magnetisation (\(\vec { M } \)) induced in the material due to the magnetising field |\(\vec H\)|.
\( \chi _{ m }=\frac { |\vec { M } | }{ |\vec { H } | } \).

Magnetic dipote moment \(\vec { p }_{ m } \) is defined as the product of its pole strength and magnetic length. It is a vector quantity denoted by \(\vec { p }_{ m } \)
\(\vec { p }_{ m } ={ q }_{ m }\vec { d } \)