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Why does a compass needle get deflected when brought near a bar magnet?
The compass needle is non-magnetic.
The compass needle has electric charge.
The compass needle is a small bar magnet.
The compass needle is made of iron.
The compass needle is a small bar magnet.
A compass needle is a small, lightweight permanent magnet pivoted on a pin, allowing it to rotate freely. When a bar magnet is brought near it, the magnetic field of the bar magnet exerts a force on the north and south poles of the compass needle, causing it to align with the external field lines.
A compass needle is a small, lightweight permanent magnet pivoted on a pin, allowing it to rotate freely. When a bar magnet is brought near it, the magnetic field of the bar magnet exerts a force on the north and south poles of the compass needle, causing it to align with the external field lines.
This concept is a fundamental application of Oersted's discovery and the principles of Magnetism (Physics), which forms the basis for Earth's magnetic field measurement studied in Geophysics.
A compass needle is a magnetized steel alloy needle, effectively acting as a permanent magnetic dipole.
Magnetic field lines originate from the north pole and terminate at the south pole of a magnet.
Interaction follows the rule: Like poles repel, unlike poles attract.
Option A is incorrect because the needle is magnetized specifically to interact with magnetic fields.
Option B is incorrect because electric charge (electrostatics) does not cause deflection in a stationary compass needle; magnetism (magnetostatics) does.
Option D is partially true in material composition (steel contains iron), but the core reason for its specific behavior is its magnetic state, not just being made of iron (which is a ferromagnetic material).
C is correct — The compass needle is a small bar magnet.
Relate this to 'Electromagnetic Induction' (Faraday's Law), where a moving magnet creates an electric current, a concept frequently tested in Science and Technology sections.
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