Concept explainers
Answer to Problem 14Q
To identify the two iron rods which are magnetised out of three iron rods.
Solution:
Explanation of Solution
Two iron rods are magnetised out of three iron rods.
A magnet can attract another magnet (unlike pole)as well as an iron rod. But it will repel like pole of another magnet. Hence repulsion is the sure test of magnetism. To identify the two iron rods which are magnetised out of three iron rods, consider one pole of any one rod, and bring this close to the poles of another rod. It may attract or repel. We must try all permutation till two poles repel each other, which confirms that the two rods are magnetised.
Conclusion:
Two iron rods are magnetised out of three iron rods.
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