Electrical Energy and Motion
Define energy
Energy is the ability to move an object over a distance.
A ___________ is a device that measures small currents.
Galvanometer
The electromagnet in the magnetic field of a galvanometer cannot rotate (more/less) than half a turn.
more.
True or False: When the current is reversed, the wire moves in the same direction.
False, it moves in the opposite direction.
An ___________ current is used to turn the pointer of a galvanometers.
Electric
True or false: An electric motor is a device that uses an electric current to turn an axle.
True.
Magnetic force can produce _______.
Motion
True or false: Galvanometers are very useful in everyday life.
True
An ______ _____ transforms electrical energy into mehcanical energy.
electric motor.
Define mechanical energy.
Mechanical energy is the energy an object has due to its movement or position.
When a current is in the electromagnet's coil, a _________ ________ is produced.
Magnetic field.
Brushed, Armature, Commutator is part of an electric motor which must be attached directly to the _____ _______.
energy source.
When a wire with a current is placed in a magnetic field, _________ energy is transformed into _______ energy.
Electrical energy is transformed into mechanical energy.
True or false: A galvanometer has a scale that is marked to show how much the pointer turns for a known current.
True
Yes or no: Is a can opener an electric motor?
Yes