Respuesta :
Answer:
A. Electromagnets are useful in many situations because they can be turned on and off.
Explanation:
The statement 'electromagnets are useful in many situations because they can be turned on and off' is TRUE about electromagnets.
What is an electromagnet?
An electromagnet is a device/object that has different electrical charges on opposite sides of the material.
- An electromagnet exhibit a positive charge on one side and one negative charge on the opposite side.
- These opposite charges are produced by a magnetic (electrostatic) field.
In conclusion, the statement 'electromagnets are useful in many situations because they can be turned on and off' is TRUE about electromagnets.
Learn more about electromagnets here:
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