NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 634 - 637 of 2142

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Question number: 634

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

MCQ▾

Question

The radius of a circular loop is r and a current i is flowing in it. The equivalent magnetic moment will be

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 635

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

MCQ▾

Question

A circular coil of 0.2 m diameter has 1000 turns and carries a current of 0.1 ampere. The intensity of magnetic field at the center of the coil is-

Choices

Choice (4) Response

a.

62.8 x 10 -4 N/A∙m

b.

6.28 x l0 -4 N/A∙m

c.

62.8 x 10 -5 N/A∙m

d.

6.28 x 10 -5 N/A∙m

Question number: 636

» Electromagnetic Induction & Alternating Currents » Lenz's Law

MCQ▾

Question

An electron moves along the line AB, which lies in the same plane as a circular loop of conducting wires as shown in the diagram. What will be the direction of current induced if any, in the loop?

Circular conducting loop with wire AB

Circular Conducting Loop With Wire AB

An electron moves along the line AB, which lies in the same plane as a circular loop of conducting wires as shown in the diagram.

Choices

Choice (4) Response

a.

The current will be anticlockwise

b.

No current will be induced

c.

The current will change direction as the electron passes by

d.

The current will be clockwise

Question number: 637

» Magnetic Effects of Current and Magnetism » Hysteresis

MCQ▾

Question

Ferromagnetic material is heated above its Curie temperature, than which one is a correct statement?

Choices

Choice (4) Response

a.

Ferromagnetic material changes itself into diamagnetic material

b.

Ferromagnetic domains are perfectly arranged

c.

Ferromagnetic domains are not influenced

d.

Ferromagnetic domains becomes random

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