New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 5

EASY

12th CBSE

IMPORTANT

Earn 100

A toroidal solenoid of mean radius $20 cm$ has $4000$ turns of wire wound on a ferromagnetic core of relative permeability $800$ . Calculate the magnetic field in the core for a current of $3 A$ passing through the coil. How does the field change, when this core is replaced by a core of bismuth?

Important Questions on Magnetism

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 6

An iron ring of mean circumferential length

30 cm

and cross-section

1 {cm}^{2}

is wound uniformly with

300

turns of wire. When a current of

0.032 A

flows in the windings; the flux in the ring is

2 \times 10^{- 6} Wb

. Find the flux density in the ring, magnetising field intensity and relative permeability of iron.

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 7

An iron ring having

500

turns of wire and a mean diameter of

12 cm

carries a current of

0.3 A

. The relative permeability of iron is

600

. What is the magnetic flux density in the core ? What is the magnetisation field intensity? What part of the flux density is due to the electronic loop currents in the core?

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 1

What is the origin of the word magnetism?

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 2

What is the source of magnetic field (or magnetism)?

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 3

Does a magnetic monopole exist? Justify your answer. How magnetic field is produced?

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 4

Repulsion is the surer test of magnetism. Comment.

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 5

How does the pole strength of each part of a bar magnet change if it is cut into two equal pieces transverse to its length?

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>VERY SHORT ANSWER CONCEPTUAL PROBLEMS>Q 5

How does the magnetic moment of each part of a bar magnet change if it is cut into two equal pieces transverse to its length?