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WorksheetsElectric and magnetic fields
Total questions: 25
Worksheet time: 14mins
what color are the Protons?
Red
Green
Yellow
What color are the Electrons
Red
Green
Yellow
These magnets would....
Repel
Attract
What are the invisible lines called around this model?
Electric Field Lines
Magnetic Field Lines
Lettuce Seeds
As the magnets get farther apart, the strength of the fields get.....
Weaker
Stronger
Stay the same
If you cut a bar magnet in half, each half would...
lose it's magnetic field
have it's own north and south poles
repel plastic objects
if electrons transfer from a wool square to a pvc wand, the wool becomes ______________ and the wand becomes_____________.
Positive, Positive
Positive, Negative
Negative, Positive
Negative, Negative
Which statement is true about both magnetic and electric fields?
Like charges repel each other
Like charges attract each other
Like poles attract each other
Like charges in electric fields.....
Attract
Repel
Transfer Electrons
What is the shape of a magnetic field around a bar magnet?
What is the shape of a magnetic field around a wire?
Four charges are placed on the corners of a rectangle as shown. If a positive charge is placed exactly at the center of the rectangle, what would happen to it?
It will move upward.
It will not move.
It will move diagonally to the lower right corner.
It will move to the right.
Which of the following is a difference between an electromagnet and a permanent bar magnet?
Electromagnets are stronger
Electromagnets can be turned off
Permanent magnets are stronger
Permanent magnets can be turned off
Which of the following is NOT true about the magnetic field around a coil of wire carrying a current?
Changing the direction of the current will reverse the poles
Increasing the number of coils will increase the strength
Making the coil wider will increase the strength
Pulling an iron core into the coil will increase the strength
If the current direction through the wire is reversed, the direction of the magnetic field:
Is also reversed
Stays in the same direction
The current stops flowing
There is no magnetic field
The (a) of a magnet are the strongest parts because the field lines are very close together
A scrap yard crane, electric bell and loudspeaker use (a)
what is an electric current
something that conducts energy
part of a light bulb
the flow of electric charge
lightning
how does an electric current produce a magnetic field?
with friction
when electricity is in motion
when electrical charge is in motion
with force and friction
