
Concept explainers
The common property of electric charges with magnetic poles.

Answer to Problem 1A
The electric charges and the magnetic poles have the same property of attraction and repulsion.
Explanation of Solution
Introduction:
Electric charge is the measure of amount of electrons flow from one point to another. The region at each end of a magnet where the magnetic field is the strongest are termed as magnetic poles.
To compare both electric charges and magnetic poles, it can be concluded that they both have the same property of attraction and repulsion. Now, electric charges are of two kinds: positive and negative. Like charges repel each other but unlike charges attract each other. Similarly, magnetic poles are of two kinds: North Pole and South Pole. Unlike poles attract each other but like poles repel each other.
Conclusion:
The electric charges and the magnetic poles have the same property of attraction and repulsion.
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