Solenoids and Electromagnets

Question 1

What is a solenoid?

Answer 1

= coiling a wire
= creates a strong + uniformed field
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Question 2

How can we increase the size of the magnetic field produced by a solenoid?

Answer 2

= increase size of the current
= increase number of turns in coils
= iron inside of solenoid- iron core

Question 3

What is an electromagnet?

Answer 3

= solenoid containing a iron core

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Question 4

Why are electromagnets useful?

Answer 4

= change strength of magentic field by changing size of the current
= turn electromagnet on and off
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