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12th Maharashtra Board
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Soft iron is used to make the core of transformer because of its

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Important Questions on Magnetic Materials

EASY
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 11 - Magnetic Materials>Exercises>Q 1
Which of the following statements is correct for diamagnetic materials:
MEDIUM
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 11 - Magnetic Materials>Exercises>Q 1
A rectangular magnet suspended freely has a period of oscillation equal to T. Now it is broken into two equal halves ( each having half of the original length) and one piece is made to oscillate freely. Its period of oscillation is T', the ratio of T' / T is. 
MEDIUM
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 11 - Magnetic Materials>Exercises>Q 1
A magnetising field of 360 Am-1 produces a magnetic flux density (B)=0.6 T in a ferromagnetic material. What is its permeability in Tm A-1 ?
MEDIUM
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 11 - Magnetic Materials>Exercises>Q 2
Which property of soft iron makes it useful for preparing electromagnet? 
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12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 11 - Magnetic Materials>Exercises>Q 2
What happens to a ferromagnetic substance heated above Curie temperature?
MEDIUM
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 11 - Magnetic Materials>Exercises>Q 2
What should be retentivity and coercivity of permanent magnet? 
EASY
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 11 - Magnetic Materials>Exercises>Q 2
Explain Curie law for a paramagnetic substance?
EASY
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 11 - Magnetic Materials>Exercises>Q 2
Obtain an expression for magnetic moment of an orbital electron.