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Mini-Quiz: Solenoids are Electromagnetic Devices

by Ron Kurtus (revised 7 February 2017)

Take this Mini-Quiz to check your understanding of the lesson material.



1. What does wrapping the electric wire in a helix do to the magnetic field?

It causes the field to be circular

Nothing happens until an iron core is added

It concentrates the field and directs it toward the helix ends

2. How does a solenoid switch work?

A magnet can be drawn into the solenoid, breaking electrical contact

The helix of the solenoid switches electricity on and off

The magnetic filled can affect nearby switches to turn them off

3. What happens to the magnetic field when an iron rod is placed in the solenoid?

The field greatly increases

The field is neutralized

It depends on how long the rod is in the solenoid

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.


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