Topic 3 - Devices and systems convert energy with varying efficiencies

Potential energy stored in chemicals.

Energy transferred by movement of electrons.

Motion or potential to move. (Energy of something moving)

Total kinetic energy of all particles.

Ability to do work.

Device which converts thermal energy to electrical energy.

Coil of insulated wire which becomes a magnet when currrent flows through it.

Produced by electric charge.

Produced by electric charges which are in motion.

• Magnet - Along the outside • Armature - Rotating shaft of the motor. • Commutator - Broken ring which breaks and reserves flow of current. • Brushes - Conducts electricity: Cell, battery, commutator

Device which converts or changes electricity at one voltage into electricity at a contrasting or different votlage.

Increases voltage.

Decreases or reduces the voltage.

Creation of electric current in a conductor by changing or contrasting the magnetic field.

Current which flows in only 1 direction.

Current which flows back and forth 60 times per second.

P = V x I

I = P/V

V = P/I

Watts {W)

Joules (J)

Seconds (S)

E = P x T

Volts (V)