NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 565 - 569 of 2184

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Question number: 565

» Magnetic Effects of Current and Magnetism » Bar Magnet

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MCQ▾

Question

The force experienced by a pole of strength 100 Am at a distance of 0.2 m from a short magnet of length 5 cm and pole strength of 200 Am on its axial line will be

Choices

Choice (4) Response

a.

5.0 x 10 -3 N

b.

2.5 x 10 -2 N

c.

2.5 x 10 -3 N

d.

5.0 x 10 -2 N

Question number: 566

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

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MCQ▾

Question

A proton is to circulate the earth along the equator with a speed of 1.0 x 10 7 m/s. The minimum magnetic field which should be created at the equator for this purpose. (The mass of proton = 1.7 x 10 -27 kg and radius of earth = 6.37 x 10 6 m) magnetic field will be (in Wb/m 2)

Choices

Choice (4) Response

a.

2 x 10 -7

b.

1.6 x 10 -19

c.

1.0 x 10 -7

d.

1.67 x 10 -8

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°