An electromagnet is the most powerful type of magnet there is. It is a magnet with a current running through it that can be turned on and off. Why might it be useful to be able to turn the electromagnet on and off?(1 point)
Responses
to not waste electricity
to not waste electricity
to reduce wearing out of the magnet over time
to reduce wearing out of the magnet over time
to control the strength of the magnet
to control the strength of the magnet
to latch onto and let go of objects
to latch onto and let go of objects
What does electric current measure?(1 point)
Responses
how frequently electrical energy moves in a circuit
how frequently electrical energy moves in a circuit
how quickly electrical energy moves in a circuit
how quickly electrical energy moves in a circuit
how well electrical energy moves in a circuit
how well electrical energy moves in a circuit
how much electrical energy moves in a circuit
how much electrical energy moves in a circuit
How is a magnetic field produced?(1 point)
Responses
when electrons move through a circuit
when electrons move through a circuit
when an object has an electric charge
when an object has an electric charge
when a current runs through a conductor
when a current runs through a conductor
when an electromagnetic field interacts with a magnet
when a current runs through a conductor
Which statement best describes how an electromagnetic motor works?(1 point)
Responses
Electrons are moved through a current, creating a circuit. That circuit interacts with a magnet, moving the conductor in the orientation of the field.
Electrons are moved through a current, creating a circuit. That circuit interacts with a magnet, moving the conductor in the orientation of the field.
Electrons are moved through a magnet, creating a circuit. That circuit interacts with a current, moving the conductor in the orientation of the field.
Electrons are moved through a magnet, creating a circuit. That circuit interacts with a current, moving the conductor in the orientation of the field.
Electrons are moved through a circuit, creating a current. That current interacts with a magnet, moving the conductor in the orientation of the field.
Electrons are moved through a circuit, creating a current. That current interacts with a magnet, moving the conductor in the orientation of the field.
Electrons are moved through a magnet, creating a current. That current interacts with a circuit, moving the conductor in the orientation of the field.
Electrons are moved through a magnet, creating a current. That current interacts with a circuit, moving the conductor in the orientation of the field.