Question

read made - to - order magnets. keep the article open throughout the assignment. select the statement that best summarizes the central idea of the article.
electromagnets are useful in many situations because they can be turned on and off.
motors change mechanical energy to electrical energy.
electromagnets work whether or not electricity is passing through the wire.
electromagnets are useful around the home but not in industry.

Explanation:

• Analyze each option:
• Option 1: Electromagnets' ability to be turned on/off makes them useful in many situations. This aligns with what one would expect from an article about electromagnets (like "Made - to - Order Magnets").
• Option 2: Motors actually convert electrical energy to mechanical energy, so this is incorrect.
• Option 3: Electromagnets require electricity to work (they are magnets created by electric current), so this is wrong.
• Option 4: Electromagnets are useful in both home and industry (e.g., in manufacturing, etc.), so this is incorrect.

Answer:

A. Electromagnets are useful in many situations because they can be turned on and off.