Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 56

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IMPORTANT

Earn 100

What is pole strength of a bar magnet if its magnetic dipole moment is $4 \times 10^{- 2} A - m^{2}$ and separation between two poles in $5 cm ?$

Important Questions on Magnetism and Matter

MEDIUM

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IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 57

The work done in turning a magnet of magnetic dipole moment

M

by

90 °

from its stable equilibrium position is

n

times the corresponding work done to turn it through an angle of

60 ° .

Find value of

n .

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 58

What do you mean by electromagnet? Compare permanent magnet with electromagnet.

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 59

What do you mean by hysteresis? Explain it. Draw hysteresis loop and show remanence and coercivity in hysteresis loop.

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 60

Define terms magnetic permeability and magnetic susceptibility. Derive relation between relative permeability and susceptibility.

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 1

An iron rod of length

l

and magnetic moment

M

is bent in the form of a semi-circle. Now its magnetic moment will be

n m .

The value of

n

is

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 2

The variation of magnetic susceptibility

(χ_{m})

with absolute temperature

(T)

for a Paramagnetic material is

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 3

At a certain place a magnet makes

30

oscillations per minute in oscillation magnetometer. At another place where horizontal component of earth's magnetic field is

4

times, its time period will be

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 4

The horizontal and vertical component of earth's magnetic field at a place are

0.3 G

and

0.6 G

respectively. The angle of dip at that place is