Magnetic Effects of Current and Magnetism (AIIMS Physics): Questions 42 - 44 of 49

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Question number: 42

» Magnetic Effects of Current and Magnetism » Hysteresis

MCQ▾

Question

The mass of a specimen of a ferromagnetic material is Equation and its density is Equation . If the area of hysteresis loop of alternating magnetizing field of frequency Equation is Equation units then the hysteresis loss per second will be –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 43

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

MCQ▾

Question

A rod of magnetic material having cross section Equation is putting in Equation magnetizing field. Magneticflux passes through the rod is Equation . Then magnetic susceptibility and magnetization of the road is, respectively –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 44

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

MCQ▾

Question

A long straight wire Equation carries a constant current distributed uniformly over a cross section perpendicular to the axis of the wire. If the current density is Equation . The magnitudes of the magnetic field at

(a) 3.0 mm from the axis of the wire and

(b) 6.0 mm from the axis of the wire is: -

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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