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Flashcards in Energy Deck (23):
1

What charge is an atom

Neutral

2

What charge is a proton

Positive

3

What charge is a neutron

Neutral

4

What charge is an electron

Negative charge

5

What are electrons

Electrons are charged particles that carry an electric current through a circuit

6

Nucleus

The core of an atom that contains protons and neutrons

7

Static electricity

Is caused by the build up of electrical charges on the surface of objects

8

Current electricity

A phenomenon from the flow of electrons along a conductor

9

Current , unit and symbol

Ampere, A

10

Voltage, unit and symbol

Volts and V

11

Resistance, unit and symbol

Ohm, omega -o-

12

Copper

Cheap which is why it is used for the wiring around a house.

13

Aluminium

More expensive but lighter which is why it's used for high voltage transmission lines

14

Series circuit, advantages

- little energy is lost in the wires
- the voltage is shared equally
- easy to set up

15

Series circuit, disadvantages

- Globes are unable to be controlled individually with a switch
- the current stops flowing if one globe blows
- adding more globes to the circuit means their brightness will be dull

16

Safety switch

Detects a leak in a current and can break the circuit within 0.03 seconds

17

Define conductor

A material that allows a current to pass through it.

Example: copper and aluminium.

18

Define insulator

Material that does not conduct electricity.

Example: rubber and plastic.

19

Overall what is the charge of an atom

Neutral as electrons and protons are equal. If an electron gets pushed off or rubbed on this can make it either positive or negative then the atom becomes an ion

20

Brief of static electricity

Is caused by the build up of electrical charge on the surface of object this occurs because the surface has been rubbed against another surface.

Static electricity can leak away into surroundings, this can cause electrons to jump across gaps which then converts into kinetic energy such as heat, light, sound and motion and for example a lightning bolt.

21

Current electricity

Current is found in your house in things such as power points as its electrons moving along a wire. If the electrons the source will not work.

22

Electric current

Is formed whenever charge flows from one spot to another, this is made up of electrons moving along a wire.

23

Resistance

A measure oh how difficult it is for current to pass: measure ohms -o-