Strength of force
What types of atomic particle is involved in electricity?
Electrons
What is the flow of electric charges called?
Current
What is a object that attracts certain metals mainly iron?
magnets
Strong temporary magnets that use electricity to provide magnetism
electromagnets
What 2 things does electric force depend on?
-amount of charge (electrons)
-Distance
What is the difference between resistance and voltage?
resistance= How difficult it is for current to flow in a circuit
voltage= the amount of power in a circuit
Examples of objects that have NO magnetic domains (at least 3)
Plastic, wood, cloth, or rubber
What are some reasons electromagnets are helpful in devices?
-Poles can be reversed
-Magnetic field can be turned off and on with electricity
What is something magnetic force depends on?
Distance, charge
Ohms law in words with units
Voltage (volts)= Current (amps) x Resistance (ohms)
Draw a picture of the domains in a permanent magnet.
answer
What causes a magnetic field surrounding a magnet to change?
Putting another magnet near it
What 2 things does gravitational force depend on?
-Mass
-Distance
Solve the problem, show work and units:
A circuit is powered with 150 volts. There are 30 ohms of resistance. What is the current?
5 amps
Draw a picture of the domains in a paperclip when it is not near a magnet.
Answer
Heavier objects have more gravity than smaller objects. Why do objects with different masses hit the ground at the same time when dropped from the same height?
Heavier objects have more inertia (resistance to moving), so it cancels out their bigger gravitational pull
Draw and label a parallel circuit and a series circuit
answer
Draw a picture of the domains in a paperclip when it is near a magnet.
Answer
-Draw a picture of a polarized object
-Explain what causes an object to become polarized.
When one charged object is put near another object, the similar charges repel each other and move on opposite ends of the objects.