NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 687 - 690 of 2320

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Question number: 687

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

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MCQ▾

Question

wire of length L has magnetic moment M. It is bent in to semicircular arc. The new magnetic moment is,

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 688

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

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MCQ▾

Question

Which of the following statements are false about the magnetic susceptibility x m of paramagnetic substance?

(1) Value of X m is directly proportional to the absolute temperature of the sample

(2) X m is negative at all temperature

(3) X m does not depend on the temperature of the sample

(4) X m is positive at all temperature

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

Choices

Choice (4)Response

a.

2 and 4 are correct

b.

1,2 and 3 are correct

c.

1 and 3 are correct

d.

1 and 2 are correct

Question number: 689

» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer

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MCQ▾

Question

What is the shape of magnet in moving coil galvanometer to make the radial magnetic field?

Choices

Choice (4)Response

a.

None

b.

Horse shoe magnet

c.

Concave cylindrical

d.

Convex cylindrical

Question number: 690

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

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MCQ▾

Question

A current of 30 A is flowing in a vertical straight wire. If the horizontal component of earth’s magnetic field is 2 x 10 -5 tesla then the distance of null point from wire is –

Choices

Choice (4)Response

a.

0.3 cm

b.

0.3 mm

c.

0.9 m

d.

0.3 m

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