Axial vs Equatorial Field — Practice Quiz

Question 1

A short bar magnet has dipole moment 0.4 A·m². Equatorial field at 10 cm distance:

Accepted Answer

4 × 10⁻⁵ T

Answer

8 × 10⁻⁵ T

Answer

2 × 10⁻⁵ T

Answer

4 × 10⁻⁴ T

Question 2

Same magnet — axial field at 10 cm:

Accepted Answer

8 × 10⁻⁵ T

Answer

4 × 10⁻⁵ T

Answer

2 × 10⁻⁵ T

Answer

16 × 10⁻⁵ T

Question 3

Axial field of a short bar magnet at large r varies as:

Accepted Answer

1/r³

Answer

1/r

Answer

1/r²

Answer

1/r⁴

Question 4

Direction of equatorial field of a dipole is:

Accepted Answer

Antiparallel to m

Answer

Parallel to m

Answer

Perpendicular to m

Answer

Random

Question 5

If two bar magnets of equal m are joined N-to-N along axis, resultant moment:

Accepted Answer

0

Answer

2m

Answer

m

Answer

−m