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- 1. Multiple Choice
Which of the following forces can push (repel) and pull (attract)?
Magnetic Force
Electric Force
Gravitational Force
Both Magnetic and Electric Force.
All Three, Magnetic, Electric and Gravitational Force.
- 2. Multiple ChoiceWhen two magnets repel, they ________________change colorpull togetherpush apartget colder
- 3. Multiple Choice
The magnitude of the force of magnetism is larger between two electromagnets when ________________
the charges are both negative.
the charges are both positive.
the charges (in coulombs) are greater.
the charges are opposite.
- 4. Multiple Choice
Iron filings and bar magnets are placed on a piece of paper. Explain the pattern on the diagram below. Where is the magnetic field the strongest?
The magnetic field is only strong at the north pole
The magnetic field is only strong at the south pole
The magnetic field is strongest at the magnet’s poles.
- 5. Multiple Choice
If the North Pole of a permanent magnet is placed next to a compass as seen in the picture, which direction will the needle move if its tip is a north pole?
Clockwise (to the right)
Counter-clockwise (to the left)
It will not move
Need more information
- 6. Multiple Choice
How can you increase the strength of this electromagnet?
Get a larger nail.
Add more loops of wire.
decrease the loops of wire.
Get a smaller nail.
- 7. Multiple Choice
The gravitational force between two objects will be very small (x 10 -11) unless which is true?
Both objects masses are very large.
One objects mass is very large.
Both objects are very far away from each other.
- 8. Multiple Choice
When placed at equal distances apart, the greatest gravitational attraction will be between two
skateboards
bowling balls
school buses
- 9. Multiple ChoiceAs the product of two objects' masses increases, the pull of gravityIncreasesDecreasesStays the same
- 10. Multiple Choice
if mass of an object is doubled, force of gravitation will be
a. halfed
b. doubled
c. increases 4 times
d. no change
- 11. Multiple ChoiceMs Jo Jo rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?The balloons will repel each other.The balloons will attract each other.The balloons will become positively (+) charged.The balloons will pop.
- 12. Multiple ChoiceWhat types of charges attract?Positive and PositivePositive and NeutralNegative and NeutralPositive and Negative
- 13. Multiple ChoiceElectric charges that are alike _______ each other.AttractRepel
- 14. Multiple ChoiceWhat is the major difference between static electricity and current electricity?Current electricity involves a continuous flow of neutrons; static electricity is a sudden transfer of protonsCurrent electricity can be deadly; static electricity is almost always safeIn current electricity, there's a single transfer of electrons; in static electricity, there's a steady flow of electronsCurrent electricity involves a flow of electrons; static electricity involves a single transfer of electrons
- 15. Multiple Choice
If more loops of wire are added to this electromagnet, what will happen?
It will pick up 10 pins instead of 5.
Nothing it will pick up the same amount of pins.
It will pick up 2 pins instead of 5.
It will be overloaded and pick up nothing.
- 16. Multiple Choice
Which of the following data would support the claim that the gravitational force between objects depends on mass?
The gravitational force gets weaker as objects get farther apart.
The graviational force only pulls on objects.
The gravitational force is greater on more massive planets.
The graviational force is only attractive.
- 17. Multiple Choice
Moving a magnet near a compass can cause the compass needle to move, even though the magnet does not touch the compass. This observation is evidence for which characteristics of magnetic fields?
There is a north and south pole on a magnet.
They can exert a force accross a distance.
Magnetic fields do not exist.
- 18. Multiple Choice
You made an electromagnet to pick up pins. It did not pick them up until the nail was next to the pins. This is because
The smaller the distance between two electromagnets the greater the force.
As distance increases between two electromagnets the force becomes greater.
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