Energy

Question 1

What charge is an atom

Answer 1

Neutral

Question 2

What charge is a proton

Answer 2

Positive

Question 3

What charge is a neutron

Answer 3

Neutral

Question 4

What charge is an electron

Answer 4

Negative charge

Question 5

What are electrons

Answer 5

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

Question 6

Nucleus

Answer 6

The core of an atom that contains protons and neutrons

Question 7

Static electricity

Answer 7

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

Question 8

Current electricity

Answer 8

A phenomenon from the flow of electrons along a conductor

Question 9

Current , unit and symbol

Answer 9

Ampere, A

Question 10

Voltage, unit and symbol

Answer 10

Volts and V

Question 11

Resistance, unit and symbol

Answer 11

Ohm, omega -o-

Question 12

Copper

Answer 12

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

Question 13

Aluminium

Answer 13

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

Question 14

Series circuit, advantages

Answer 14

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

Question 15

Series circuit, disadvantages

Answer 15

• 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

Question 16

Safety switch

Answer 16

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

Question 17

Define conductor

Answer 17

A material that allows a current to pass through it.

Example: copper and aluminium.

Question 18

Define insulator

Answer 18

Material that does not conduct electricity.

Example: rubber and plastic.

Question 19

Overall what is the charge of an atom

Answer 19

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

Question 20

Brief of static electricity

Answer 20

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.

Question 21

Current electricity

Answer 21

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.

Question 22

Electric current

Answer 22

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

Question 23

Resistance

Answer 23

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