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xz_007 [3.2K]
2 years ago
7

What would we need to do to make an electromagnet strong enough to move cars and trains

Physics
1 answer:
SVEN [57.7K]2 years ago
5 0

Answer:

The combined magnetic force of the magnetized wire coil and iron bar makes an electromagnet very strong. In fact, electromagnets are the strongest magnets made. An electromagnet is stronger if there are more turns in the coil of wire or there is more current flowing through it.

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Read 2 more answers
Suppose your friend claims to have discovered a mysterious force in nature that acts on all particles in some region of space. H
kirill [66]

Answer:

             U = 1 / r²

Explanation:

In this exercise they do not ask for potential energy giving the expression of force, since these two quantities are related

             

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this derivative is a gradient, that is, a directional derivative, so we must have

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the esxresion for strength is

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let's replace

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             U = B / 2r²

we substitute the value of B = 2

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