Magnetic Field and Magnetism Concepts

The video tutorial covers sections 5.7, 5.8, and 5.9 from the topic of magnetism and matter. It explains the calculation of the magnetic field produced by a short bar magnet with a given magnetic moment at a specific distance from its center, both on the axial and equatorial lines. The video also discusses the concept of null points and how the total magnetic field is determined. Additionally, it explores the effect of rotating the magnet by 180 degrees on the position of null points.

What is the magnetic moment of the short bar magnet discussed in the video?

• 0.48 J/T

• 0.36 J/T

• 0.96 J/T

• 0.18 J/T

At what distance from the center of the magnet is the magnetic field calculated?

• 20 cm

• 15 cm

• 10 cm

• 5 cm

What is the direction of the magnetic field on the axial line?

• North-South

• East-West

• South-North

• West-East

What is the magnitude of the magnetic field on the axial line?

• 0.48 Gauss

• 0.96 Gauss

• 1.44 Gauss

• 0.24 Gauss

How does the magnetic field on the equatorial line compare to the axial line?

• It is half

• It is zero

• It is double

• It is the same

What is the direction of the magnetic field on the equatorial line?

• West-East

• South-North

• East-West

• North-South

Where are the null points located when the magnet is aligned along the magnetic North-South direction?

• On the axial line

• On the equatorial line

• At the center

• At infinity

What is the total magnetic field on the normal bisector of the magnet?

• 0.72 Gauss

• 0.54 Gauss

• 0.36 Gauss

• 0.18 Gauss

After rotating the magnet by 180°, where are the new null points located?

• On the axial line

• On the equatorial line

• At infinity

• At the center

What is the distance of the new null points from the center after the magnet is rotated?

• 14 cm

• 11.1 cm

• 5.5 cm

• 7 cm