Differences between bar magnet and electric magnet
This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
ScanSolve AI Answer
Here are the key differences between a bar magnet and an electromagnet:
Source of Magnetism: A bar magnet has permanent magnetism due to the alignment of its internal atomic magnetic domains. An electromagnet* produces magnetism when an electric current flows through a coil of wire, typically wrapped around a ferromagnetic core.
Control: The magnetic field of a bar magnet is always present and cannot be turned on or off. The magnetic field of an electromagnet* can be easily controlled by switching the electric current on or off.
Strength: The strength of a bar magnet is fixed. The strength of an electromagnet* can be varied by changing the amount of current flowing through the coil or the number of turns in the coil.
Polarity: The poles (North and South) of a bar magnet are fixed. The polarity of an electromagnet* can be reversed by reversing the direction of the electric current.
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