Terms
Electromagnetism is the relationship between _________ and _________.
electricity and magnetism
A temporary magnet made up of a wire wrapped around a core.
What is an electromagnet?
Lightning is a form of
a. air current
b. magnetism
c. cloud cover
d. static electricity
What is a (d) static electricity?
What type of force is electric force?
Non-contact
Of these materials, which would NOT make a good insulator
a. plastics.
b. metals.
c. rubber tubing.
d. cotton cloth.
What is (b) metals?
A circuit that has only one path that electricity can follow?
What is a series circuit?
The places on a magnet where the magnetism is the strongest are the:
a. south pole and middle
b. north pole and middle.
c. north and south pole.
d. east pole and west pole.
What is (c) north and south pole.
Negative particles of an atom used to produce electricity are called...
What are electrons?
Lightning is a form of __________ electricity.
Static
Electric energy is produced by the movement of
a. protons
b. neutrons
c. nucleus
d. electrons
What is (d) electrons?
The buildup of charges on an object?
What is static electricity?
How is an electromagnet different from a permanent magnet?
A. An electromagnet is smaller and less powerful.
B. An electromagnet’s magnetism can be turned off.
C. An electromagnet can be built without using metal.
D. An electromagnet does not attract objects containing iron.
What is B. An electromagnet’s magnetism can be turned off.
Which of the following demonstrates static electricity?
a. You know you should never put your fingers into an electrical outlet. You could get shocked.
b. You bend a paper clip back and forth until it breaks. The broken ends feel hot.
c. You brush your hair on a cold, dry day. Your hair springs away from your head and sticks out in all directions.
d. You use a charger to charge batteries for a digital camera.
What is (C.) You brush your hair on a cold, dry day. Your hair springs away from your head and sticks out in all directions.
Electric field lines are used to represent ________ and ________.
direction and strength
A student wants to block the flow of electricity. Which substance would be best?
a. Aluminum
b. Copper
c. Iron
d. Rubber
What is (d). rubber?
An object that allows electricity to flow?
What is a conductor?
Which statement is true?
a. Bar magnets are permanent, but electromagnets are temporary.
b. Bar magnets and electromagnets are permanent.
c. Electromagnets are permanent, but bar magnets are temporary.
What is (a) Bar magnets are permanent, but electromagnets are temporary?
Which of these materials makes a good insulator of electricity?
a. plastics
b. saltwater
c. Aluminum foil
d. silver
What is (a.) plastics?
Explain the difference between a conductor and an insulator and give an example of each.
A CONDUCTOR IS A MATERIAL THAT ALLOWS ELECTRONS TO MOVE THROUGH IT EASILY. E.G. COPPER, GOLD, SILVER (ANY APPROPRIATE EXAMPLE). AN INSULATOR IS A MATERIAL THAT ELECTRONS HAVE A DIFFICULT TIME MOVING THROUGH. E.G. RUBBER, PLASTIC (ANY APPROPRIATE EXAMPLE).
Who is the scientist who first discovered that electricity and magnetism are related?
Hans Christian Orsted
Which choice best completes this sentence:
Like poles ___________, while
unlike poles ______________.
a. repel, repel
b. attract, repel
c. repel, attract
d. attract, attract
What is (c) repel, attract?
What areas of a magnet have the strongest magnetic force?
The poles
Why is it unsafe to have electrical cords near water?
What is... you become part of the circuit and you can get electrocuted?
For an electromagnet to operate properly, the circuit must be
a. insulated.
b. series.
c. parallel.
d. unbroken.
What is (d). unbroken.
Magnetic fields can be detected by using _________ or ___________.
iron filings or compass