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Flashcards in Electricity Deck (25):
0

What is an electric current?

An electric current is the flow of electrons

1

What are currents measured in?

Amps

2

A short is when?

The circuit overheats

3

Static electricity is?

An electric charge that is not moving

4

Electricity is cause by ?

Movement of electrical charges
- usually negatively charged electrons
- require a conductor to flow through

5

A battery's electrons start from where?

The negative terminal, and are attracted to the positive terminal

6

A current is?

The continuous movement of electrons

7

Electric charges do what?

(Mainly electrons) they move around an electric circuit, as they do so they carry electrical energy.

8

What is an electric exactly?

A closed conducting pathway

9

An electric circuit contains 3 parts, what are they?

1- a SOURCE of electrical energy
2- a CONDUCTING PATHWAY
3- LOAD (energy sink)
Where electrical energy is changed into another energy form

10

What is it called when the positive and negative charges become separated?

State of excitement

11

CONDUCTING PATHWAY
What will happen when a conducting pathway is provided?

The positives and negatives will try to get back together. As they do this the energy they had will get changed into some other form.
Eg. LIGHT, HEAT, MOVEMENT

12

PRODUCING ELECTRICITY
In a DRY cell (torch battery) or WET cell (car battery) a continuous chemical ______? Separates the charges

Reaction

13

PRODUCING ELECTRICITY
In a turning electrical generator a what effect separates the charges?

An electromagnet effect

14

Foil is a conductor or insulator?

A conductor

15

Steel wool is a conductor or insulator?

Conductor

16

A paper clip is a conductor or insulator?

A conductor

17

A paddle pop stick is a conductor or insulator?

An insulator

18

Porcelain is a conductor or insulator?

An insulator

19

Rubber is a conductor or insulator?

An insulator

20

Cotton is a conductor or insulator?

An insulator

21

Straw is a conductor or insulator?

An insulator

22

Conductor means?

Charged particles able to move

23

Insulator means?

No movement of charged particles

24

The ELECTRICAL RESISTANCE of a material is a measurement of?

How difficult it is for charged particles to move through it