Magnetic Effects of Current and Magnetism [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 5 - 9 of 246

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Question 5

Question MCQ▾

A short bar magnet is placed with its north pole pointing south. The neutral point is 10 cm away from the center of the magnet. If H = 0.4 gauss, calculate magnetic moment of the magnet.

Choices

Choice (4)Response

a.

0.2Am2

b.

lAm2

c.

0.1 Am2

d.

2Am2

Edit

Question 6

Question Assertion-Reason▾

Assertion(Ꭺ)

We cannot think of magnetic field configuration with three poles.

Reason(Ꭱ)

A bar magnet does not exert a torque on itself due to its own field.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are false

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Ꭺ is true but Ꭱ is false

d.

Ꭺ is false but Ꭱ is true

Edit

Question 7

Question MCQ▾

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

Choices

Choice (4)Response

a.

Retentivity

b.

Coercive force

c.

None

d.

Lorentz force

Edit

Question 8

Question MCQ▾

Which of these particles in motion is not affected by magnetic field B?

Choices

Choice (4)Response

a.

α-particle

b.

neutron

c.

Electron

d.

proton

Edit

Question 9

Question Assertion-Reason▾

Assertion(Ꭺ)

Cyclotron does not accelerate electron.

Reason(Ꭱ)

Mass of the electron is very small.

Choices

Choice (4)Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is false but Ꭱ is true

Edit