Magnetic Effects of Current and Magnetism-Hysteresis (NEET Physics): Questions 1 - 4 of 5

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Question number: 1

» Magnetic Effects of Current and Magnetism » Hysteresis

MCQ▾

Question

In the hysteresis cycle, the value of H needed to make the intensity of magnetization zero is called

Choices

Choice (4) Response

a.

Coercive force

b.

Retentivity

c.

Lorentz force

d.

None

Question number: 2

» Magnetic Effects of Current and Magnetism » Hysteresis

MCQ▾

Question

Ferromagnetic material is heated above its Curie temperature, than which one is a correct statement?

Choices

Choice (4) Response

a.

Ferromagnetic material changes itself into diamagnetic material

b.

Ferromagnetic domains are perfectly arranged

c.

Ferromagnetic domains are not influenced

d.

Ferromagnetic domains becomes random

Question number: 3

» Magnetic Effects of Current and Magnetism » Hysteresis

MCQ▾

Question

The mass of a specimen of a ferromagnetic material is 0.6 kg and its density is 7.8 x 10 3 kg/m 3. If the area of hysteresis loop of alternating magnetizing field of frequency 50Hz is 0.722 MKS units then the hysteresis loss per second will be

Choices

Choice (4) Response

a.

27.77 x 10 -4 Joule

b.

277.7 x 10 -6 Joule

c.

277.7 x 10 -5 Joule

d.

277.7 x 10 -4 Joule

Question number: 4

» Magnetic Effects of Current and Magnetism » Hysteresis

MCQ▾

Question

Which of the following statements are correct about hysteresis?

(1) This effect is common to all ferromagnetic substances

(2) The hysteresis loop area is proportional to the thermal energy developed per unit volume of the material

(3) The shape of the hysteresis loop is characteristic of the material

(4) The hysteresis loop area is independent of the thermal energy developed per unit volume of the material

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

2 and 4 are correct

c.

1, 2 and 3 are correct

d.

1 and 2 are correct

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