WorksheetsGenerators and Motors | Physics in Motion
Total questions: 18
Worksheet time: 9mins
rotor
A stationary component of an electromagnetic system in an electric motor.
A moving component of an electromagnetic system in an electric motor or generator.
A type of battery used in electric motors.
A cooling system for electric generators.
Alternating current
A type of current that flows in one direction only.
A constantly reversing current.
A current that is always at rest.
A current that can only be generated by batteries.
Commutator
A part of a simple electric motor that consists of two semicircular pieces of metal. It conducts the current from the brushes to the armature.
A device that converts electrical energy into mechanical energy.
A component that stores electrical energy for later use.
A type of switch used to control the flow of electricity.
Motors
Devices that convert electrical energy into mechanical energy.
Devices that convert mechanical energy into electrical energy.
Devices that store electrical energy for later use.
Devices that regulate electrical energy flow.
Step-down transformers
The primary coil has more loops than the secondary coil.
The primary coil has fewer loops than the secondary coil.
The voltage is increased to supply power to homes.
They are used to convert AC to DC.
Commutation
The process of converting alternating current into direct current.
The electromechanical process by which direct current is turned into alternating current.
A method for increasing voltage in electrical circuits.
The technique used to measure electrical resistance.
Transformer
A device that increases or decreases voltage.
A device that stores electrical energy.
A device that converts AC to DC.
A device that measures electrical resistance.
Electromagnetic Induction
Generating electric current from the motion of a conductor through a magnetic field.
Creating a magnetic field by passing an electric current through a coil.
Storing electric energy in a magnetic field.
Transforming electrical energy into mechanical energy.
Direct current
Current that runs in only one direction.
Current that alternates direction periodically.
Current that is generated by batteries only.
Current that can flow in multiple directions.
Faraday's Law
A law that predicts how a magnetic field will interact with an electric circuit to produce an electromotive force.
A principle that states energy cannot be created or destroyed, only transformed.
A theorem that describes the relationship between voltage, current, and resistance in an electrical circuit.
A rule that explains how light behaves when it passes through different mediums.
Step-up Transformer
The primary coil has more loops than the secondary coil, increasing voltage.
The primary coil has fewer loops than the secondary coil, so we are adding loops to increase power.
The primary coil and secondary coil have the same number of loops, maintaining voltage.
The primary coil has fewer loops than the secondary coil, decreasing voltage.
Brushes
They are used to insulate the wires in the motor.
They conduct current to the commutator.
They provide mechanical support to the rotor.
They are responsible for cooling the motor.
Electric Motor
A device that uses an electric current to turn an axle and transforms electrical energy into mechanical energy.
A device that converts mechanical energy into electrical energy.
A device that stores electrical energy for later use.
A device that generates electricity from solar energy.
Galvanometer
A device that uses an electromagnet to detect small amounts of current.
A tool for measuring voltage in electrical circuits.
An instrument for generating electrical energy.
A device that amplifies electrical signals.
Generators
Devices that convert mechanical energy into electrical energy.
Devices that convert electrical energy into mechanical energy.
Devices that store electrical energy for later use.
Devices that measure electrical energy consumption.
Stator
The rotating component of an electric motor or generator.
The stationary component of an electric motor or generator.
A type of electrical insulation used in motors.
A device that converts mechanical energy into electrical energy.
Permanent magnets
An object made from a material that is magnetized and creates its own persistent magnetic field.
A type of magnet that only works when electricity is applied.
A temporary magnet that loses its magnetism quickly.
A magnet that can only attract certain metals.
Armature
A loop of wire through which current flows in a simple electric motor.
A type of battery used in electric motors.
A component that stores electrical energy in a circuit.
A device that converts electrical energy into mechanical energy.
