Electrical Principles and Technologies Part Three Flashcards
What is energy?
The ability to do work.
What is work?
The transfer of energy.
What is the Joule?
The unit of measure for energy.
What are the four common forms of energy?
1) chemical energy
2) electrical energy
3) mechanical energy
4) thermal energy
What is chemical energy?
Stored in chemicals and released when chemicals react. Potential/stored energy in foods, fuels, batteries, explosives.
What is electrical energy?
Energy of charged particles, transferred when electrons travel from place to place.
What is mechanical energy?
Energy of motion, energy possessed by an object because of its motion or its potential to move.
What is thermal energy?
Total kinetic energy of all particles in a substance. The faster a particle moves, the more kinetic energy.
What is the 2 cup analogy?
Compare two cups holding equal amounts of water, the one containing more thermal energy will feel warmer.
What is energy conversions?
All forms of energy can be converted to other forms.
What is the law of conservation of energy?
Energy cannot be created nor destroyed.
What is a thermocouple?
A device that converts thermal energy to electricity.
What is the Hans Oersted Demonstration?
1820: Compass needle deflected by magnetic field of a current carrying wire. Proved a current flowing through wire creates magnetic field around wire.
What did Michael Faraday do in 1831?
Made the first electric motor, proving electromagnetic force can produce continuous motion.
What is a permanent magnet?
Hard steel alloy which stays magnetic for a long time.