Magnetic Effects of Current and Magnetism (NEET Physics): Questions 96 - 100 of 155

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Question number: 96

» 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: 97

» 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

Question number: 98

» Magnetic Effects of Current and Magnetism » Para, Dia and Ferro-Magnetic Substances

MCQ▾

Question

A superconductor exhibits perfect

Choices

Choice (4) Response

a.

Diamagnetism

b.

Paramagnetic

c.

Ferrimagnetism

d.

Ferromagnetism

Question number: 99

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

MCQ▾

Question

A straight horizontal copper wire carries a current i = 30 A. The linear mass density of the wire is 45 g/m. What is the magnitude of the magnetic field needed to balance its weight?

Choices

Choice (4) Response

a.

0 Gauss

b.

147 Gauss

c.

441 Gauss

d.

14.7 Gauss

Question number: 100

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

MCQ▾

Question

A particle having charge q, mass m and kinetic energy E, enters a magnetic field B normally. It will oscillated with frequency equal to,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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