Electric Motors
What is the name of the device that uses an electric current to turn an axel?
Electric motor
What is a generator?
A devices that changes mechanical energy into electrical energy
If a transformer has a primary voltage of 220 V, 10 primary loops, and 6 secondary loops, what is the secondary voltage?
132 V
What happens when a straight wire with a current running through it is placed in a magnetic field?
It will move up or down
What kind of energy does an electric motor convert to mechanical energy?
Electrical energy
What is a transformer?
A device that changes the voltage to make electricity useful
If a transformer has a secondary voltage of 150 V, 3 primary loops, and 9 secondary loops, what is the primary voltage?
50 V
What happens when a loop of wire with a current running through it is placed in a magnetic field?
It will spin
Name something that uses an electric motor.
Car, electric fan, pencil sharpener, etc.
What is a galvanometer?
A device that measures small currents
If a transformer has a primary voltage of 800 V, a secondary voltage of 200 V, and 20 primary loops, how many secondary loops does it have?
5 loops
What happens when two magnetic fields interact?
They can make a force on an object
Why are magnets necessary to turn an electric motor?
A loop of wire with a current running through it spins in a magnetic field, so magnets are necessary to make the motor spin.
What is electromagnetic induction?
The process of generating an electric current from the motion of a conductor through a magnetic field
If a transformer has a primary voltage of 100 V, a secondary voltage of 1000 V, and 30 secondary loops, how many primary loops does it have?
3 loops
Which type of current happens when a wire in a magnetic field constantly changes direction?
Alternating current