Electromagnetism 1
A bar magnet is broken in half. What will the resulting two pieces both have?
What is a north and south pole?
Electrical current supplied without a battery.
What is a generator?
Magnetism completely depends upon?
What are electrons?
Electrical current supplied by a battery.
What is an electric motor?
A solenoid wrapped around a bar of iron or other ferromagnetic material.
What is an electromagnet?
When a current flows through a wire, this is produced.
What is a magnetic field?
These are the two ways to increase the strength of an electromagnet.
What is increasing the number of coils or increasing the amount of current (adding batteries)?
What determines the strength of the magnetic force?
What is the distance between the magnets?
What will always produce a magnetic field?
What is an electric current?
The magnetic field produced is directly proportional to..
What is the number of coils?
When a wire is exposed to a changing magnetic field, this is produced.
What is an electrical current?
A generator converts mechanical energy to electrical energy by using a conducting metal loop turning in a
What is a magnetic field?
This is a device that uses an electromagnet to change electrical energy to mechanical energy.
What is an electric motor?
A magnet can generate an electric current in a wire if the magnet is close enough to the wire and if the magnet is also..
What is in motion?
Magnetic field lines run from...
What is from the north to the south pole?
Magnetic items must have aligned...
What is domains?
What does not affect the strength of an electromagnet?
What is the size of an object?
After a storm, a hospital may have to rely on backup generators to power some equipment. Which is the energy conversion provided by the generators?
What is mechanical energy to electrical energy?
Magnetism produced by electric current is known as this.
What is electromagnetism?
Forces that exert on one another resulting in repulsion or attraction.
What is magnetic force?
A loop of copper wire that is connected to a lightbulb is attached to a wind turbine. The loop is placed in a magnetic field. As wind blows against the turbine, the loop of copper wire rotates and the bulb lights up. What is being described?
What is an electric generator?
What will most likely induce an electric current in a nearby conductor at rest?
What is a weak magnetic field that is increasing in strength?
A compass is wrapped within a coil of copper wire that is connected to a switch and a battery. What explains why a compass needle turned 90 degrees when the switch is closed?
What is a current producing a magnetic field?
What set of conditions will produce an electric current in a closed loop of wire?
What is a magnet passing through the loop of wire?
The ability of magnets to create an electric current and of electric currents to create magnetic field?
What is electromagnetic induction?