A small bar magnet produces a magnetic field magnitude of at a point on its axial…

PHYSICS · Single correct · CBSE · Physics · Magnetism and Matter · Magnetism and Matter

Problem

A small bar magnet produces a magnetic field magnitude of

30\,\mu\text{T}

at a point on its axial line that is

4.0\,\text{cm}

from its center. At what distance from the magnet’s center along the same line will the field magnitude be

3.75\,\mu\text{T}

? (a)

6.3\,\text{cm}

(b)

8.0\,\text{cm}

(c)

2.0\,\text{cm}

(d)

11.3\,\text{cm}