Electricity Chapter 12 Flashcards
What is Current electricity
A steady current of electricity that travels through a conductor. it is predictable and is used to power most devices in our houses
What is static electricity
Electrons gather up in one place (the surface) and move in all direction, it has an un predictable flow
What is a electric circuit
A path through that electrons current flow
Why cant electrons flow with a dead battery
Electrons cannot flow through a dead battery because the chemical reaction has stooped that produces electric energy.
what is a black out and what causes it?>
a black out is a temporary loss of electricity in a certain area. black outs are caused by electric grid faliuar
what is in a electric circuit
- Energy source
- Load
- Conducting Wires
- Switches (sometimes)
What is electric energy
The energy provided by the flow of electrons in a circuit
what are the two main sources of electric energy
batteries and electric generators
what is a cell
A device that turns chemical energy into electrical energy
Primary Cell
a cell that may only be used once
Secondary cell
A rechargeable cell
How many cells does it take to make battery
there is int and exact number it all detriments on how much voltage and how many cells your battery can hold on
What is the differnce in
AC and DC
Dc or Direct current, a current that doesnt change its path; it goes from a negative to a positive. AC or alternating current, a current that can change its path
What is a generator
A device that converts mechanical energy into electrical energy.
What is a simple generator made of>?
A simple genarator is made of a wire coil near a magnet.
Why is a generator attached to a turbine
The turbine provides it with mechanical energy
Define non renewable energy
A source of energy that takes up to millions of years for it to renew naturally
What are the two types of non renwalble energy
Fossil fules and Nuclear energy
What are pros and cons of Non renewable energy
Pron: they are cheaper
Cons: releases Co2, acid rain destroy habitats
how is electricity made from non renewable sources
Sources such as Fossil Fuels and nuclear energy they are burned and after being burned they are hot and they turn them into steam then that steam is used to rotatea turbine to create electricity. this procese is called thermal power generation
Name the 5 renewable sources
Water, Wind, Solar, geo-thermarl. biomass
