Beta Question Bank for Engineering: Physics>Chapter 26 - Matter and Magnetism>Exercise-1>Q 49

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If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by $μ_{_{d}}, μ_{p}$ and $μ_{f}$ respectively, then:

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Important Questions on Matter and Magnetism

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Beta Question Bank for Engineering: Physics>Chapter 26 - Matter and Magnetism>Exercise-1>Q 50

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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Beta Question Bank for Engineering: Physics>Chapter 26 - Matter and Magnetism>Exercise-1>Q 51

Liquid oxygen remains suspended between the two pole faces of a magnet because it is

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Beta Question Bank for Engineering: Physics>Chapter 26 - Matter and Magnetism>Exercise-1>Q 52

Cause of Ferromagnetism:

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Beta Question Bank for Engineering: Physics>Chapter 26 - Matter and Magnetism>Exercise-1>Q 53

The magnetic susceptibility of a paramagnetic substance is

3 \times 10^{- 4} .

If placed in a magnetising filed of

4 \times 10^{4} A m

.The intensity of magnetisation will be:

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Beta Question Bank for Engineering: Physics>Chapter 26 - Matter and Magnetism>Exercise-1>Q 54

The volume susceptibility of a magnetic material is 30 × 10^–4. Its; relative permeability will be :-

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Beta Question Bank for Engineering: Physics>Chapter 26 - Matter and Magnetism>Exercise-1>Q 55

The magnetic moment of a magnet of mass

75 gm is 9 \times 10^{- 7} A m^{2}

. If the density of the material of magnet is

7.5 \times 10^{3} kg m^{- 3}

than intensity of magnetization will be:

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Beta Question Bank for Engineering: Physics>Chapter 26 - Matter and Magnetism>Exercise-1>Q 56

The coercivity of a bar magnet is 100A/m. It is to be demagnetised by placing it inside a solenoid of length 100 cm and number of turns 50. The current flowing the solenoid will be :

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Beta Question Bank for Engineering: Physics>Chapter 26 - Matter and Magnetism>Exercise-1>Q 57

The space inside a toroid is filled with tungsten of susceptibility

6.8 \times 10^{- 5}

. The percentage increase in the magnetic field will be,