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ch.17 electricity

QuestionAnswer
Law of Electric Charge like Charges repel and opposite charges attract
Electric Force force between charged objects
Electric Field a region around a charged particle that can exert a force on another charged particle
3 Ways to “charge it” Friction, Conduction, Induction
Conservation of Charge no charges are created or destroyed
How can a charge be detected using an electroscope
Conductor material in which charges can move easily,
Ex of Conductor copper, silver, aluminum, mercury
Insulator Material that charges can’t move easily
Ex of Insulators plastic, rubber, glass, wood
Static Electricity Buildup of electric charges on an object
Electric discharge loss of static electricity as charges move off an object
Lightning one of the greatest examples of electric discharge
Lightning Rods Pointed Rod connected to the ground through a wire
Grounded objects in contact with the earth
Dangerous places to be in a lightning storm Beaches, Golf courses
Cell device that produces an electric current by converting chemical energy into electrical energy
Battery device made of many several cells does the same thing
Parts of a battery - electrolyte & electrode Electrolyte mixture of chemicals that turns chemical energy into electrical energy, Electrode-two conducting metals that make contact with the electrolyte, charges enter or exit
Types of Battery Cells wet cells and dry cells
What is the relationship between potential difference & volts volts are used to express potential difference
Photocells & examples part of a solar panel that converts light into electricity, calculator
Thermocouple device used to convert thermal energy into electrical energy
Electrical current the rates at which charges pass a given point
Two types of electrical current AC and DC
Direct Current direct current has one direction
Alternating Current alternating current continually changes direction
Voltage the difference in energy per unit charges as a charge moves between two points in the path of a current
Resistance the opposition to the flow of electric charge
What is the relationship between resistance & current resistance can determine the speed of a current
How thickness, length & temperature effect electrical current thick wires have less resistance, long wires have more, the colder the wire the less resistance
What is Ohm’s Law? Current, voltage and resistance could be expressed with the equation I
Electrical Power Formula Power equals Voltage X Current
Watt the unit of electricity
How is household energy measured by the energy company by multiplying the power in kilowatts by the time in hours
Created by: ibriana97
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