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- 1. Multiple Choice
What effect will the north pole of one magnet have on the north pole of another magnet
Repulsive
Attractive
Combative
No effect
- 2. Multiple Choice
Why are paperclips attracted to magnets
They contain silver
They contain aluminum
They contain tin
They contain iron
- 3. Multiple Choice
What is the simplest requirement for an electromagnet
A coil of electrified wire
A coil of electrified wire wrapped around an iron core
A bar magnet and a power source
length of electrified wire
- 4. Multiple Choice
Where does a magnetic field occur in relation to an electrified wire?
At either end, but not in the middle
Only on the side closes to source of electricity
Around the entire length of the wire
Only on the side furthest from the source of electricity
- 5. Multiple Choice
How would you compare the magnetic field generated by a simple length of wire to the magnetic field generated by a coil of wire?
The coil generates a stronger magnetic filed
The coil generates a weaker magnetic field
The field generated by the coil has different polarity than the field generated by the length of wire
The coil generates a field that attracts iron objects; the length of wire generates a field that attracts silver objects.
- 6. Multiple Choice
Which of the following depicts a solenoid?
- 7. Multiple Choice
How do electromagnets differ from regular magnets
They can be turned on and off
Their polarity can be reversed
Their strength can be changed
All of the above
- 8. Multiple Choice
How might an electric motor be used in a washing machine?
To make water flow into the machine
To make the machine spin
To add the correct amount of soap
To make water drain out of the machine
- 9. Multiple Choice
When will a circuit breaker trip, or turn off?
When the polarity of the electromagnet inside it is reversed
When a very strong current passes through it
When any type of current passes through it
When a special on/off switch is activated
- 10. Multiple Choice
To change the polarity of a magnet, you would...
Reverse the current's direction
Reverse the direction in which the coil is wound
Turn the battery, or other power source, upside-down
Remove the iron core from within the coil of wire
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