NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 617 - 621 of 2184

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Question number: 617

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

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MCQ▾

Question

An electron beam passes through a magnetic field of 2 x 10 -3 weber/m 2 and an electric field of 1.0 x 10 4 volt/m both acting simultaneously. If the electric field is removed, what will be the radius of the electron path?

Choices

Choice (4) Response

a.

2.43 cm.

b.

3.43 cm.

c.

1.43 cm.

d.

0.43 cm

Question number: 618

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

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MCQ▾

Question

A circular coil has radius 4 cm and 20 number of turns carries a current of 3 ampere. It is placed in a magnetic field of intensity 0.5 weber/m 2. The magnetic dipole moment of the coil is, (take

Choices

Choice (4) Response

a.

0.15 ampere m 2

b.

0.45 ampere m 2

c.

0.3 ampere m 2

d.

0.6 ampere m 2

Question number: 619

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

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MCQ▾

Question

Dimensional formula of μ 0 is-

Choices

Choice (4) Response

a.

MLT 2 A -2

b.

MLT -2 A 2

c.

MLT 2 A 2

d.

MLT -2 A -2

Question number: 620

» Magnetic Effects of Current and Magnetism » Ampere's Law

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MCQ▾

Question

A solenoid of length 0.2m has 500 turns on it. If 8.71 x 10 -6 Weber/m 2 be the magnetic field at an end of the solenoid, then the current flowing in the solenoid is –

Choices

Choice (4) Response

a.

b.

A

c.

d.

Question number: 621

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

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Assertion-Reason▾

Question

Assertion (Ꭺ)

The permeability of a ferromagnetic material dependent on the magnetic field.

Reason (Ꭱ)

Permeability of a material is a constant quantity.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

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

c.

Ꭺ is false but Ꭱ is true

d.

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