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Flashcards in definitions Deck (20):
1

Conducting wire



Allows electrons to flow

2


Switch

Controls the circuit

3


Load

Uses the electrical energy

4


Energy source

Provides electrical potential energy

5

cells in series

Cells in series:
-Connects cells on top of one another (+ to -)
-One path for electricity to flow.
-Electrical potential increases.
-A light bulb will burn twice as brightly.
VT=V1+V2+V3….

6

cells in parallel

Cells in parallel:
-Connected cells side by side.
-Positive terminals connected together and negative terminals connected together.
-Electric potential remains the same, but with twice as much electric charge, allowing it will operate for twice as long.
VT=V1=V2=V3….

7

electric current



a measure of the amount of electric charge that passes by a point in an electric circuit each second.

8


potential difference (voltage drop)


the electric potential energy that an electron possesses.

9

energy



Capability of an object to do work.

10


efficiency


a measure of how much work or energy is conserved in a process.

11

Renewable resources

have essentially an endless supply, such as solar energy, wind energy and geothermal pressure, while other resources are considered renewable even though some time or effort must go into their renewal, such as wood, oxygen, leather and fish.

12

Non renewable resources

a resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption. Most fossil fuels, such as oil, natural gas and coal are considered nonrenewable resources in that their use is not sustainable because their formation takes billions of years.

13

Static electricity

when electrons gather on the surface of an object and move randomly in all directions. Unpredictable nature makes this form difficult to use sometimes.

14

Current electricity

refers to electric charges (electrons) that flow through a conductor wire in a controlled way on a predictable path (the circuit).

15

material



Silver has the least resistance but is very expensive to use in wires. Most conducting wires are made from copper.

16


temperature


As the temperature of the wire increases, its resistance increases and its conductivity decreases. A colder wire is less resistant than a warmer wire.

17


length


Longer wires offer more resistance than shorter wires. If the wire doubles in length, it also doubles in resistance.

18


thickness


Wider wires often offer less resistance than thinner wires.If the wire doubles in width, its resistance is a half as great. Conducting wires that carry large currents need large diameter to lessen their resistance.

19

AC current

A current flowing one way, then another, back and forth, very quickly.

20

DC current

The unidirectional flow or movement of electric charge carriers.