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The ratio of intensity of magnetization and magnetizing field is called

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Important Questions on Magnetic Effects of Current and Magnetism

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Physics Crash Course NEET>Chapter 14 - Magnetic Effects of Current and Magnetism>Level 2>Q 80
Nickel shows the ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show
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Physics Crash Course NEET>Chapter 14 - Magnetic Effects of Current and Magnetism>Level 2>Q 81
If a diamagnetic substance is brought near north or south pole of a bar magnet, it is,
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Physics Crash Course NEET>Chapter 14 - Magnetic Effects of Current and Magnetism>Level 2>Q 82
If X is the magnetic susceptibility and T is the Curie's temperature. Then, the correct curve between X and 1T for a paramagnetic material is:
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Physics Crash Course NEET>Chapter 14 - Magnetic Effects of Current and Magnetism>Level 2>Q 83
On placing a piece of ferromagnetic material of cross-sectional area 1 cm2 in a magnetic field of 200 oersted, a flux density of 3000 G is produced in it. The values of relative permeability and magnetic susceptibility of the material will, respectively, be:
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Physics Crash Course NEET>Chapter 14 - Magnetic Effects of Current and Magnetism>Level 2>Q 84
For substances, hysteresis (B-H) curves are given as shown in figure. For making a temporary magnet, which of the following is the best?
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Physics Crash Course NEET>Chapter 14 - Magnetic Effects of Current and Magnetism>Level 2>Q 85
The variation of magnetic susceptibility (χ) with absolute temperature T for a ferromagnetic material is,
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Physics Crash Course NEET>Chapter 14 - Magnetic Effects of Current and Magnetism>Level 2>Q 86

The relative permeability μr of a ferromagnetic substance varies with temperature T according to the curve,

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Physics Crash Course NEET>Chapter 14 - Magnetic Effects of Current and Magnetism>Level 3>Q 1
Biot-Savart law indicates that the moving electrons (velocity v) produce a magnetic field B such that: