At a distance of on its axial line

PHYSICS · Single correct · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism

Problem

At a distance of

10\,\text{cm}

on its axial line, a magnetic dipole produces a field magnitude of

240\,\text{nT}

. Approximately how far from the dipole along the same line must a sensor be placed so that it measures a field magnitude of

50\,\text{nT}

? (a)

22\,\text{cm}

(b)

48\,\text{cm}

(c)

17\,\text{cm}

(d)

13\,\text{cm}