Which conclusion follows most directly from the note that a freely suspended bar magnet points north-south?
AThe bar magnet has no poles
BThe earth exerts an orienting magnetic effect on the magnet
CThe magnet must be electrically charged
DThe magnet attracts every object placed near it
Answer & Solution
Correct answer: B. The earth exerts an orienting magnetic effect on the magnet
If a freely suspended magnet consistently aligns north-south, it implies that the earth provides a directional magnetic influence that orients the magnet. The statement does not imply electric charge or universal attraction.
Related questions
Two straight long conductors $AOB$ and $COD$ are perpendicular to each other and carry curA cell is connected between the points $A$ and $C$ of a circular conductor $ABCD$ of centrAn infinitely long conductor $PQR$ is bent to form a right angle as shown. A current $I$ fFor a positively charged particle moving in a $x - y$ plane initially along the $x$-axis, A small square loop of wire of side $l$ is placed inside a large square loop of wire of siA wire of length $1\,\mathrm{m}$ is moving at a speed of $2\,\mathrm{ms}^{-1}$ perpendiculA uniform but time-varying magnetic field $B(t)$ exists in a circular region of radius $a$The unit ratio μ0 ε0 has the same dimensions as: