A region normally has a horizontal geomagnetic field of pointing toward geographic north

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A region normally has a horizontal geomagnetic field of

25\,\mu\text{T}

pointing toward geographic north. A nearby ferromagnetic ore body adds an additional horizontal field of

10\,\mu\text{T}

directed due east. Ignoring any vertical components, in which direction will a freely pivoting compass needle point? (a)

14^{\circ}

east of geographic north (b)

67^{\circ}

east of geographic north (c)

22^{\circ}

east of geographic north (d)

22^{\circ}

west of geographic north