A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 11

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Needles $N_{1}, N_{2}$ and $N_{3}$ are made of a ferromagnetic, paramagnetic and diamagnetic substance respectively. Magnet when brought close to them will

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Important Questions on Magnetic Properties of Matter

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 12

Curie-Weiss law is obeyed by iron

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 13

A frog can be levitated in magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behave as

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 14

The magnetic susceptibility of a material of a rod is

499

The absolute permeability of vacuum is

4 π \times 10^{- 7} {Hm}^{- 1}

The absolute permeability of the material of rod is

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 15

Among the following properties describing diamagnetism identify the property that is wrongly stated

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 16

Which one of the following substances should have crystalline structure ?

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 17

All substances show the property of

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 18

A soft iron ring has a mean diameter of

0.20 m

and an area of cross-section

5 \times 10^{- 4} m^{2}

. It is uniformly wound with

2000

turns carrying a current of

2 A

and the magnetic flux in the iron is

8 \times 10^{- 3} Wb

. What is the relative permeability

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 19

The most appropriate $I - H$ curve for a paramagnetic substance, shown in Fig. is 11.16

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