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Boojho made an electromagnet by winding $50$ turns over an iron screw. Paheli also made an electromagnet by winding $100$ turns over a similar iron screw. ____ electromagnet attracts more pins.

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Detailed Solution

Boojho made an electromagnet by winding

50

turns over an iron screw. Paheli also made an electromagnet by winding

100

turns over a similar iron screw. Paheli electromagnet attracts more pins.
The electromagnet's strength is proportional directly to the number of turns in the coil. Therefore, if you increase the number of turns, you increase the electromagnet's strength. Therefore, Paheli's electromagnet will attract additional pins as it has an additional number of turns of wire on it. So, Paheli's electromagnet is the strongest.

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