NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 567 - 571 of 2320

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Question number: 567

» Magnetic Effects of Current and Magnetism » Current Loop as Magnetic Dipole

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MCQ▾

Question

A thin circular wire carrying a current I has a magnetic moment M. The shape of the wire is changed to a square and it carries the same current. It will have a magnetic moment

Choices

Choice (4)Response

a.

b.

M

c.

d.

Question number: 568

» Magnetic Effects of Current and Magnetism » Bar Magnet

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MCQ▾

Question

A bar magnet of length 0.2 m and pole strength 5 Am is kept in a uniform magnetic induction field of strength 15 wb-m -2 making an angle of 30° with the field. Find the c ouple acting on it.

Choices

Choice (4)Response

a.

2.5 Nm

b.

7.5 Nm

c.

9.0 Nm

d.

5.5 Nm

Question number: 569

» Magnetic Effects of Current and Magnetism » Magnetic Susceptibility and Permeability

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MCQ▾

Question

A magnetizing field of produces a magnetic flux density of 8π Tesla in an iron rod. The relative permeability of the rod will be,

Choices

Choice (4)Response

a.

10 2

b.

10 1

c.

10 4

d.

10°

Question number: 570

» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field

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MCQ▾

Question

A l m long conducting wire is lying at right angles to the magnetic field. A force of 1 kg weight is acting on it in a magnetic field of 0.98 tesla. The current flowing in it will be,

Choices

Choice (4)Response

a.

1A

b.

100 A

c.

0

d.

10 A

Question number: 571

» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field

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MCQ▾

Question

In the example above, after how much time, particle comes to the starting point for the first time, (mass of particle = m)

Choices

Choice (4)Response

a.

b.

c.

Never

d.

It will leave the circular path before coming to the starting point

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