CE - Chapter 7 Vocabulary

Question 1

Ammeter

Answer 1

A device used to measure the current in a circuit (Pg. 239)

Question 2

Ampere

Answer 2

The SI unit for measure electrical current (Pg. 239)

Question 3

Battery

Answer 3

A combination of electrochemical cells (Pg. 243)

Question 4

Circuit

Answer 4

A complete path in which electrons can flow; includes an energy source, electrical load, and conducting wires (Pg. 237)

Question 5

Circuit Breaker

Answer 5

A safety device in which wire heats up and bends when there is excess current in the circuit, triggering a spring mechanism that turns off the flow of electricity (Pg. 263)

Question 6

Circuit Diagram

Answer 6

A model used by engineers and designers in order to design and analyze an electrical circuit (Pg. 250)

Question 7

Current Electrical Energy

Answer 7

The flow of electric charge in a circuit (Pg. 237)

Question 8

Dry Cell

Answer 8

An electrochemical cell that uses paste instead of a liquid electrolyte; also called a primary cell (Pg. 243)

Question 9

Electric Current

Answer 9

A measure of the amount of electrical charge that passes by a point in an electrical circuit in a given time interval (Pg. 239)

Question 10

Electrochemical Cell

Answer 10

A package of chemicals that converts chemical energy into electrical energy that is stored in charged particles (Pg. 243)

Question 11

Electrodes

Answer 11

A metal strip that reacts with an electrolyte (Pg. 243)

Question 12

Electrolyte

Answer 12

A liquid or paste that contains chemicals that form ions and conducts electric charge (Pg. 234)

Question 13

Fuse

Answer 13

A safety device in an electric circuit which has a metallic conductor with a low melting point compared to the circuit’s wires, and which melts where there is excess current in the circuit (Pg. 263)

Question 14

Load

Answer 14

A device that converts electrical energy to another form of energy (Pg. 237)

Question 15

Multimeter

Answer 15

A multifunctional meter that can function as an ammeter, ohmmeter, or voltmeter (Pg. 240)

Question 16

Ohm’s Law

Answer 16

The law establishes the relationship between voltage (V), current (I) and resistance (R); it states that as long as temperature stays the same that V=IR (Pg. 259)

Question 17

Ohmmeter

Answer 17

A device for measuring electrical resistance (Pg. 240)

Question 18

Ohms

Answer 18

The SI unit for measuring resistance (Pg. 240)

Question 19

Parallel Circuit

Answer 19

An electric circuit in which the components are arranged in parallel paths; an electric circuit that has multiple paths along which electrons can flow (Pg. 251)

Question 20

Resistance

Answer 20

The degree to which a substance opposes electric current through it (Pg. 240)

Question 21

Resistor

Answer 21

A material that can flow current flow in a circuit, such as the filament in a light bulb (Pg. 241)

Question 22

Series Circuit

Answer 22

An electric circuit in which the components are arranged one after another; and electric circuit that has only one path along which electrons can flow (Pg. 251)

Question 23

Short Circuit

Answer 23

An accidental low-resistance connection between two points in a circuit, often causing excess current flow (Pg. 262)

Question 24

Superconductor

Answer 24

A type of conductor that has no electrical resistance below a characteristic temperature (Pg. 241)

Question 25

Switch

Answer 25

A device that turns the circuit on or off by closing or opening the circuit (Pg. 237)

Question 26

Transistor

Answer 26

A tiny device that acts as a switch or amplifier in a circuit (Pg. 249)

Question 27

Volt (V)

Answer 27

The SI unit for measuring voltage (Pg. 238)

Question 28

Voltage

Answer 28

The difference in electrical energy between two points in a circuit (Pg. 238)

Question 29

Voltmeter

Answer 29

A device used to measure voltage (Pg. 238)

Question 30

Wet Cell

Answer 30

An electrochemical cell that uses a liquid electrolyte (Pg. 243)