Magnetism
Two magnets are attracted to each other. What can you infer about the poles of the magnets that are in contact?
One end is a South pole and the other is a North pole
Which type of charging occurs when you rub a balloon on your hair?
friction
As a satellite falls toward Earth, the gravitational force between the satellite and Earth increases. Explain why there is an increase in gravitational force?
The distance between Earth and the satellite decreases.
Some of the materials for a laboratory experiment are copper wire, plastic tubing, and a pair of cotton gloves. Why is the copper wire the best electrical conductor in this group of materials?
Copper wire allows electric charges to flow easily through it.
A solenoid is connected to a voltage supply (battery). Which modification would decrease the magnetic field inside of the solenoid?
Reduce the number of turns/coils
Why does a compass needle point north?
It reacting to Earth's magnetic field.
An uncharged object becomes charged without direct contact. What method of charging is occurring?
induction
The amount of gravitational attraction between the Moon and an astronaut standing on its surface depends on the astronaut’s distance from the center of the Moon and the astronaut’s
mass
Give me one real world example of an insulator.
Various answers.
An electromagnet is made up of these 3 parts.
wire, battery, iron core/nail
Describe a magnetic field?
a region around a magnet in which you can measure magnetic forces
After rubbing a rubber brush on wool, Gilbert is able to use the brush to pick up small strips of paper. What causes the paper to be attracted to the brush?
What is static electricity?
If two objects are two meters apart, How can you increase the gravitational force between the two objects?
bring them closer together/ decrease distance
Plastic and wood are poor conductors of electric current, while copper and steel are good conductors of electric current. Which combination of materials would supply the most amount of resistance to an electric current?
plastic and wood
Give 3 ways to make an electromagnet stronger.
add more loops or coils, use a stronger battery, or use a larger iron core