Force
What do you call a push or a pull?
Force
How will two magnets behave if both of their NORTH poles of facing each other?
The magnets will repel
What is a pathway for the flow of electricity?
Circuit
What is produced when there is movement of an electric charge or current through an electromagnet?
A Magnetic Field
What do you call the part of a motor that rotates when energy is transferred to it?
Shaft
A force acting between surfaces in contact. This acts to resist motion.
Friction
What tool detects the presence of a magnetic field?
A compass
What is the flow of electricity through a wire?
An Electric Current
What did we wrap around the iron nail to create a stronger magnetic field in our electromagnet?
Copper Wire
Which part of the motor transfers the electric current to the commutator?
Brushes
What is the unit of measurement for Force?
Newton (N)
Fill in the blanks:
Magnetic field lines always go from the __________ pole towards the ____________ pole.
NORTH pole towards the SOUTH pole
In order for a light bulb to turn on, there has to be what type of circuit?
A CLOSED circuit
What do you call a piece of iron that behaves like a magnet only when it is under the influence of an external magnetic field?
Temporary Magnet
Which part of the motor acts as a switch by changing the direction of the electric current?
Commutator
If a person is pulling on a rope with 29 N to the left, and another person is pulling on the rope in the opposite direction (to the right) with 40 N; what is the net force and what direction will the rope move?
Net Force is 11 N to the right
Why are you able to pick up more paper clips with two magnets compared to just one magnet?
Two magnets will have a bigger and stronger magnetic field
Which part of a circuit stores energy?
The Battery
Fill in the blank:
An __________________ is made using the flow of electricity through a wire to produce a temporary magnetic field around an iron core.
Electromagnet
Which part of the electric motor includes the temporary magnet?
The electromagnet
Fill in the blank:
The force must be ____________ than the opposing force of friction acting on the object for it to move.
Greater
Materials that are magnetic have polarity; what does it mean to have polarity?
Something with polarity will have a CHARGE
Which part of a circuit can be turned "on" and "off" to create an open or closed circuit?
The Switch
What is the difference between an electromagnet and a permanent bar magnet?
Electromagnets can be turned OFF, permanent magnets can not
Where are the permanent magnets located in an electric motor?
In the CASING