360580 Consider the statements given below.
I.
Isolated magnetic poles do not exist.
II.
There are no sources or sinks of \(B\), the simplest magnetic element is a dipole or a current loop.
III.
All magnetic phenomena can be explained in terms of an arrangement of dipoles and/or current loops.
IV.
The net magnetic flux through any closed surface is zero.
Choose the correct options from those given below.

360581 Assertion :
Earth's magnetic field inside a closed iron box is less as compared to the outside.
Reason :
The magnetic permeability of iron is low.

360582 Two uniform magnetic fields \(B\) and \(H\) are perpendicular to each other at a place. When a magnetic needle is placed in the field, at rest it is making angle \(60^{\circ}\) and \(30^{\circ}\) with \(B\) and \(H\) respectively. The value of \(B:H\) is

360580 Consider the statements given below.
I.
Isolated magnetic poles do not exist.
II.
There are no sources or sinks of \(B\), the simplest magnetic element is a dipole or a current loop.
III.
All magnetic phenomena can be explained in terms of an arrangement of dipoles and/or current loops.
IV.
The net magnetic flux through any closed surface is zero.
Choose the correct options from those given below.

360581 Assertion :
Earth's magnetic field inside a closed iron box is less as compared to the outside.
Reason :
The magnetic permeability of iron is low.

360582 Two uniform magnetic fields \(B\) and \(H\) are perpendicular to each other at a place. When a magnetic needle is placed in the field, at rest it is making angle \(60^{\circ}\) and \(30^{\circ}\) with \(B\) and \(H\) respectively. The value of \(B:H\) is

360580 Consider the statements given below.
I.
Isolated magnetic poles do not exist.
II.
There are no sources or sinks of \(B\), the simplest magnetic element is a dipole or a current loop.
III.
All magnetic phenomena can be explained in terms of an arrangement of dipoles and/or current loops.
IV.
The net magnetic flux through any closed surface is zero.
Choose the correct options from those given below.

360581 Assertion :
Earth's magnetic field inside a closed iron box is less as compared to the outside.
Reason :
The magnetic permeability of iron is low.

360582 Two uniform magnetic fields \(B\) and \(H\) are perpendicular to each other at a place. When a magnetic needle is placed in the field, at rest it is making angle \(60^{\circ}\) and \(30^{\circ}\) with \(B\) and \(H\) respectively. The value of \(B:H\) is