Q22 of 238 Page 82

What is a solenoid? Draw a sketch to show the magnetic field pattern produced by a current-carrying solenoid.

A solenoid is a long coil containing a large number of close turns of insulated copper wire.


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21

How does an electromagnet differ from a permanent magnet?

 21

Name two devices in which electromagnets are used and two devices where permanent magnets are used.

 22

Name the type of magnet with which the magnetic field pattern of a current-carrying solenoid resembles.

 22

What is the shape of field lines inside a current-carrying solenoid? What does the pattern of field lines inside a current-carrying solenoid indicate?