Which of the following sets contains only properties of a bar magnet mentioned in the notes?
APermanent in nature, like poles repel, freely suspended north pole points north
BTemporary in nature, like poles attract, freely suspended north pole points west
CPermanent in nature, all substances are attracted, pole strength vanishes on cutting
DRequires current, unlike poles repel, points randomly when suspended
Answer & Solution
Correct answer: A. Permanent in nature, like poles repel, freely suspended north pole points north
Option A matches the notes exactly: a bar magnet is permanent, like poles repel, unlike poles attract, and when freely suspended its north pole points north. The other options contain statements not given or directly contradicting the notes.
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: