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ch7 and 8 stguide
| Question | Answer |
|---|---|
| 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 |
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missyprissi96
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