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- 1. Multiple Choice
A student makes an electromagnet but needs it to be stronger. Which of the choices below would accomplish this?
Add more loops of wire to the coil.
Remove loops of wire from the coil.
Reduce the voltage of the battery.
Increase the voltage of the battery.
- 2. Multiple Choice
What is the energy conversion that takes place in a motor?
electromagnetic to mechanical
mechanical to light
gravitation to mechanical
mechanical to electromagnetic
- 3. Multiple Choice
What is the energy conversion that takes place in a generator?
electromagnetic to mechanical
mechanical to light
gravitation to mechanical
mechanical to electromagnetic
- 4. Multiple Choice
Which of these choices will create a magnetic field
A spinning electron
A current-carrying wire
A coil of wire connected to a voltmeter
A battery sitting on the desk.
- 5. Multiple Choice
Students collect data during a lab about the magnetic field that forms around a current-carrying wire. Look at the data table and choose the student below who has the best justification for the results.
The distance from the wire does not affect the magnetic field strength detected.
The closer you get to the wire, the stronger the magnetic field strength becomes.
The closer you get to the wire, the weaker the magnetic field strength becomes.
- 6. Multiple Choice
Students collect data during a lab about the magnetic field that forms around a current-carrying wire. Look at the data table and choose the student below who has the best justification for the results.
The current through the wire does not affect the magnetic field strength detected.
The higher the current in the wire, the stronger the magnetic field strength becomes.
The higher the current in the wire, the weaker the magnetic field strength becomes.
- 7. Multiple Choice
Which of the following best describes a situation in which magnetic induction is occurring?
A permanent magnet sits beside a wire and current flows through the wire.
An ammeter is attached to the wire and current flows through the wire.
A coil of wire is moved inside a magnetic field from a permanent magnet creating current in the wire.
A switch is closed on a simple circuit with a battery and a switch so current flows through the wire.
- 8. Multiple Choice
Which device can be used to detect the presence and direction of a magnetic field?
A generator
An ammeter
A compass
A ruler
- 9. Multiple Choice
The device pictured to the right is a(n)
generator
motor
electromagnet
magnet inducer
- 10. Multiple Choice
Which of the following items are required to make a motor?
An iron core
A coil of wire
A battery
A permanent magent
- 11. Multiple Choice
Which of the following items are required to make an electromagnet?
An iron core
A coil of wire
A battery
A permanent magent
- 12. Multiple Choice
Which of the following items will make a simple electromagnet (a coil of wire attached to a battery) more effective at picking up paperclips?
inserting an iron core inside the coil.
attaching a voltmeter to the circuit
using a bigger voltage battery
inserting a pencil inside the coil
- 13. Multiple Choice
Why does a motor begin to rotate?
The current exerts force on the wire.
The current creates a magnetic field around the wire that gets pushed by the permanent magnet
Someone's hand has to keep it rotating.
The permanent magnet pulls current from the battery and that makes the dead wire move.
- 14. Multiple Choice
This image is a metal block. Which of these statements best explains what the image is showing.
These are magnetic domains; since they are not aligned this is a magnetic material but not a permanent magnet.
These are magnetic domains; since they are not aligned this is NOT a magnetic material.
These are magnetic domains; since they are not aligned this is a permanent magnet.
- 15. Multiple Choice
Shown in the image is 2 bar magnets. What types of poles are interacting?
2 opposite poles
2 north poles
2 south poles
- 16. Multiple Choice
Which of these changes would result in a greater induced voltage and current during magnetic induction?
Use a coil with more loops.
Use a coil with less loops.
Fluctuate the magnetic field faster.
Fluctuate the magnetic field slower.
- 17. Multiple Choice
The wire in the image is vertical and the current is flowing downward. Which direction is the magnetic field acting on the right side of the wire?
into the screen
out of screen
upward
to the left
- 18. Multiple Choice
Shown in the image is 2 bar magnets. What types of poles are interacting?
2 opposite poles
2 north poles
2 south poles
- 19. Multiple Choice
Choose which similarity and which difference applies for electric charges and magnetic poles.
Difference: charges can attract or repel but magnetic poles only attract
Difference: you can separate charges but you can't separate magnetic poles
Similarity: charges and magnetic poles can attract or repel
Similarity: you can separate charges and magnetic poles
- 20. Multiple Choice
A magnetic compass is placed near a copper wire. When the wire is connected into a battery, the compass needle changes position. Which of the following is the best explanation for the movement of the compass needle?
The copper wire magnetizes the needle to create a force.
The needle magnetizes the copper wire to create a force.
Current flows through the compass needle making it move.
The current in the wire creates a magnetic field that exerts a force on the compass needle.
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