A paramagnetic substance of susceptibility 4 × 10 - 4 is placed in a magnetic field of 5 × 10 4 Am - 1 Calculate the intensity of magnetisation?

M → = χ . B → = 4 × 10 - 4 × 5 × 10 4 = 20 A m - 1

A paramagnetic substance of susceptibility 4 × 10 - 4 is placed in a magnetic field of 5 × 10 4 Am - 1 . Calculate the relative permeability?

μ r = 1 + χ μ r = 1 + 4 × 10 - 4 μ r = 1 . 0004

The magnetic susceptibility of paramagnetic substance at 300 K is 1 . 6 × 10 - 5 . Calculate its susceptibility at 400 K .

Magnesium is a paramagnetic substance and it follows, χ = C μ 0 T i.e χ . T = Constant In first case, χ . T = 1 . 6 × 10 - 5 . 300 In second case, 1 . 6 × 10 - 5 . 300 = χ . 400 χ = 1 . 2 × 10 - 5

HARD

12th West Bengal Board

IMPORTANT

Earn 100

What is Bohr magneton. Deduce its expression using Bohr's postulate.

Important Questions on Magnetic Properties of Matter

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 1

A paramagnetic substance of susceptibility

4 \times 10^{- 4}

is placed in a magnetic field of

5 \times 10^{4} {Am}^{- 1}

Calculate the intensity of magnetisation?

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 1

A paramagnetic substance of susceptibility

4 \times 10^{- 4}

is placed in a magnetic field of

5 \times 10^{4} {Am}^{- 1}

. Calculate the relative permeability?

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 2

A solenoid of

700

turn

/ m

is carrying a current of

4 A

. Its core is made of iron which has a relative permeability of

6000

. Determine the magnitude of magnetic intensity, magnetisation and the magnetic field inside the core.

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 3

The magnetic susceptibility of paramagnetic substance at

300 K

1.6 \times 10^{- 5} .

Calculate its susceptibility at

400 K

HARD

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 4

The core of a toroid having

4000

turns has inner and outer radii of

12 cm

and

13 cm

respectively. The magnetic field in the core for a current of

1 A

3 T

. What is the relative permeability of the core?

MEDIUM

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 5

A sample of paramagnetic salt contains

2.0 \times 10^{24}

atomic dipoles each of dipole moment

1 \cdot 5 \times 10^{- 23}

{JT}^{- 1}

. The sample is placed under a homogeneous magnetic field of

0.64 T

and cooled to a temperature of

4.2 K

. The degree of magnetic saturation achieved is equal to

15

percent. What is the total dipole moment of the sample for a magnetic field of

0.98 T

and a temperature of

2.8 K

? (Assume Curie's Law).

MEDIUM

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 6

A toroid of mean circumference of

0.5 m

has

500

turns, each. Find

H

and

B

if the toroid has bearing a current of

0.15 A

MEDIUM

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 11 - Magnetic Properties of Matter>EXERCISE 11>Q 6

A toroid of mean circumference of

0.5 m

has

500

turns, each bearing a current of

0.15 A

. Find

B

and the magnetisation

M

, if the core is filled with iron of relative permeability

5000

What is Bohr magneton. Deduce its expression using Bohr's postulate.

Important Questions on Magnetic Properties of Matter

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