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HI! I NEED HELP ASAP!!
Why are electromagnets used in metal scrap yards?


A.They are temporary magnets, so they can be turned on and off.


B. They are very powerful permanent magnets.


C. They are weak permanent magnets.


D. They are temporary magnets, so eventually the metal just falls off.

Respuesta :

danielleace10

Answer:

The answer is A. They are temporary magnets, so they can be turned on or off.

Explanation:

An Electromagnet consist of a soft ion core in a current carrying solenoid that is wound in opposite direction round the two arms of a bar.

They are temporary magnets and they loose their magnetic property the moment they are turned off.

jesica154

Answer:

A. They are temporary magnets, so they can be turned on or off.

Explanation:

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