# Shared Flashcard Set

## Details

Electricity and Magnetism
Chapter 2
23
Physics
03/08/2007

Term
 circuit breaker
Definition
 a safety device that uses an electromagnet to shut off a circuit when the current becomes too high
Term
 ammeter
Definition
 a device used to measure current in a circuit
Term
 conduction
Definition
 a method of charging an object by allowing electrons to flow directly from one object to another object
Term
 conservation of charge
Definition
 the law that states that charges are neither gained nor destroyed
Term
 electric field
Definition
 the field around charged particles that exerts a force on other charged particles
Term
 electrical potential
Definition
 the potential energy per unit of electric charge
Term
 electroscope
Definition
 an instrument used to detect electric charge
Term
 friction
Definition
 a force that is exerted when two substances are rubbed together; electrons are transferred by rubbing
Term
 fuse
Definition
 a safety device with a thin metal strip that will melt if too much current passes through the circuit
Term
 grounded
Definition
 allowing charges to flow directly from the circuit to the ground connection
Term
 induction
Definition
 a method of electrically charging an object by means of the electric field of another object
Term
 lightning rod
Definition
 a metal rod on a building connected to a grounding wire; meant to protect a building from lightning damage
Term
 Ohm's law
Definition
 resistance equals voltage divided by current
Term
 parallel circuit
Definition
 an electric circuit with multiple paths
Term
 potential difference
Definition
 the difference in electrical potential between two places; measured in volts
Term
 series circuit
Definition
 an electric circuit with a single path
Term
 short circuit
Definition
 an electrical connection that allows current to take an unintended path
Term
 static discharge
Definition
 the loss of static electricity as electric charges move off an object
Term
 static electricity
Definition
 a buildup of charges on an object
Term
 third prong
Definition
 the round prong of a plug which connects the metal shell of an appliance to the safety grounding wire of a building
Term
 voltage
Definition
 potential difference; measured by a voltmeter
Term
 voltage source
Definition
 creates a potential difference in an electric circuit; batteries and generators are examples of these
Term
 voltmeter
Definition
 a device used to measure voltage or potential difference
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