HSC Science (General) 12th Board ExamMaharashtra State Board
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Find the magnetization of a bar magnet of length 10 cm and cross-sectional area 4 cm^2, if the magnetic moment is 2 Am^2. - HSC Science (General) 12th Board Exam - Physics

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Question

Find the magnetization of a bar magnet of length 10 cm and cross-sectional area 4 cm2, if the magnetic moment is 2 Am2.

Solution

Given:

Mnet = 2 Am2, l = 10 cm = 10 x 10–2 m,
area of cross section =4 cm2 = 4 x 10–4 m2

To find:

magnetisation (MZ)

`M_z=M_"net"/V`

`V=lxx""cross sectional area`

`=(10xx10^-2xx4xx10^-4)`

`=4xx10^-5m^3`

From formula,

`M_z=2/(4xx10^-5)`

`M_z=50000 A/m`

The intensity of magnetisation is 50000 A/m.

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APPEARS IN

 2016-2017 (July) (with solutions)
Question 7.1 | 7.00 marks

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Solution Find the magnetization of a bar magnet of length 10 cm and cross-sectional area 4 cm^2, if the magnetic moment is 2 Am^2. Concept: Magnetisation and Magnetic Intensity.
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