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ch7 and 8 stguide

QuestionAnswer
Charging a balloon by rubbing it on wool is an example of Charging by contact
A _____ is a circuit with only one path for current to follow Series circuit
An accumulation of excess electric charge Static electricity
According to ________, electric charge cannot be created or destroyed Law of conservation of charge
______ is the result of electrons colliding with atoms as current flows Change
What is the formula for electrical energy? E=power • time
Circuits usually include how many components? 3
What are 3 types of batteries? Dry-cell, wet-cell, lead-acid batteries
How much can lightning raise the temperature of the air around it? 30,000°
An __________ surrounds every electric charge Electric field
The amount of ____ charge on a proton, equals the amount of_________ charge on an electron Positive; negative
What happens to the clothes in a dryer? The atoms in some clothes become negatively charged, and others positively, making the clothes stick together
Lightning is a _____ static discharge Large
The earth is a large _______ object that can conduct charge Magnetic
Electric current is measured in _____ Amperes
Some electrical energy is converted into _______ energy Thermal
What's the formula for finding current? Current = voltage difference ÷ resistance
What type of circuit has only one loop to flow through? Series circuit
A household circuit is mostly a _____ circuit Parallel
A dryer outlet is _____ as large as a regular outlet Twice
The rate at which electrical energy is converted to anotherbform of energy is _______ Electrical power
Electric current is measured in _____ Amperes
Some electrical energy is converted into _______ energy Thermal
What's the formula for finding current? Current = voltage difference ÷ resistance
What type of circuit has only one loop to flow through? Series circuit
A household circuit is mostly a _____ circuit Parallel
In a _______, current only has on loop to flow through Series circuit
A dryer outlet is _____ as large as a regular outlet Twice
The rate at which electrical energy is converted to anotherbform of energy is _______ Electrical power
What type of circuit is used i a flashlight Series circuit
How does an object 'become chared When electric charges have moved from one place to another
Electrons are held tightly to atoms and ________ Molecules
If the ______ is broken, electrical current will not flow Circuit
In a _______, current only has on loop to flow through Series circuit
The accumulation of excess electric charge on an object Static electricity
The rate at which electrical energy is converted into another form of energy is called Electric power
A material in which electrons are able to move easily is a _____ conductor
The accumulation of excess electric charge on an object Static electricity
What type of appliance normally has electric elements Ovens and hair dryers
What's one advantage of parallel circuits When one branch of the circuit is opened, the current continues to flow through the other branches
Unit for power Watt
What type of appliance normally has electric elements Ovens and hair dryers
What device was used in a home before circuit breakers were used to control electricity Fuses
Unit for power Watt
In the U.S. what is the voltage difference in most parallel circuits 120 Volts
What device was used in a home before circuit breakers were used to control electricity Fuses
In the U.S. what is the voltage difference in most parallel circuits 120 Volts
Electric current is measured in _____ Amperes
Some electrical energy is converted into _______ energy Thermal
What's the formula for finding current? Current = voltage difference ÷ resistance
What type of circuit has only one loop to flow through? Series circuit
A household circuit is mostly a _____ circuit Parallel
A dryer outlet is _____ as large as a regular outlet Twice
The rate at which electrical energy is converted to anotherbform of energy is _______ Electrical power
What type of circuit is used i a flashlight Series circuit
How does an object 'become chared When electric charges have moved from one place to another
Electrons are held tightly to atoms and ________ Molecules
If the ______ is broken, electrical current will not flow Circuit
In a _______, current only has on loop to flow through Series circuit
The rate at which electrical energy is converted into another form of energy is called Electric power
A material in which electrons are able to move easily is a _____ conductor
The accumulation of excess electric charge on an object Static electricity
What's one advantage of parallel circuits When one branch of the circuit is opened, the current continues to flow through the other branches
What type of appliance normally has electric elements Ovens and hair dryers
Unit for power Watt
What device was used in a home before circuit breakers were used to control electricity Fuses
In the U.S. what is the voltage difference in most parallel circuits 120 Volts
A current increases, ______ alsoincreases Heat
The voltage difference, current and resistance in a circuit are _____ Related
The arrangement of electrons on a neutral object caused by a nearby charged object Charging by induction
The net movement of electric charges in a single direction Electric current
Related the the force that causes electric charges to flow Voltage difference
The current in a circuit equals the voltage difference divided by the resistence Ohm's law
Connecting the object to earth Grounding
Refers to the properties and interactions of magnets Magnetism
Exerts a force on other magnets and objects Magnetic field
Where the magnetic force extended by the magnet is strongest Magnetic poles
The groups of atoms with aligned magnetic poles Magnetic domains
A temporary magnet made by wrapping a wire coil carrying a current around an iron core Electromagnet
A single wire wrapped into aa cylindrical wire coil Solenoid
Devices that use an electromagnet to measure electric current Galvanometer
A device that changes electrical energy into mechanical energy Electric motor
The generation of a current by a changing magnetic field Electromagnetic induction
Uses ele tromagnetic induction to transform mechanical energy into electrical energy Generator
A large wheel that rotates when pushed by water, wind, or steam Turbine
Flows only in one direction through a wire Direct current
Reverses the direction of the current in a regular pattern Alternating current
A device that increases or decreases the voltage of an alternating current Transformer
Materials attracted to magnets Iron, nickel, cobalt
Created by: missyprissi96