science - electricity pt2

Question 1

what is static electricity

Answer 1

• the buildup of electric charge on the surface of an object, often due to friction,
• leading to an imbalance of charges

Question 2

what is electric current
pec

Answer 2

• is the flow of electrons
• needs - energy, pathway and component

Question 3

what is current

Answer 3

• the flow of electric charge
• the rate at which charge flows through a circuit

Question 4

what is voltage

Answer 4

• electrical energy supplied to electrons
• how strong an electric charge is at a given point

Question 5

what is the current symbol, unit and unit symbol

Answer 5

symbol - I
unit - ampere
unit symbol - A

Question 6

what is the voltage symbol, unit and unit symbol

Answer 6

symbol - V
unit - volts
unit symbol - V

Question 7

what are the current types of energy

Answer 7

kinetic
sound
heat
solar
light

Question 8

what are the static types of energy

Answer 8

elastic
nuclear
chemical
gravitational
electromagnetic

Question 9

what is an insulator

Answer 9

a material that does not allow electrons to pass through it
- wool
- cardboard

Question 10

what is a conductor

Answer 10

a material that does allow electroms to pass through it
- copper (metals)
- water
- wires

Question 11

what is a series circuit

Answer 11

• all components connected in a single path for current to flow
• not common in homes
• if failure occurs the whole circuit will fail

Question 12

what is a Parallele circuit

Answer 12

• components connected in a parallel and total current flow is shred between components
• commonly used in homes
• if failure occurs only part of the circuit will be affected

Question 13

What is a current series circuit

Answer 13

in a series circuit the current across all components are the same

Question 14

what is the voltage of a series circuit

Answer 14

in a series circuit the voltage across all components is shared

Question 15

what is the current of a parallel circuit

Answer 15

in a parallel circuit the current is shared equally between components

Question 16

what is the voltage of a parallel circuit

Answer 16

in a parallel circuit the voltage is the same across each component

Question 17

what is resistance

Answer 17

Resistance is the opposition to the flow of electric current in a conductor, measured in ohms.

Question 18

what is resistance in a circuit

Answer 18

Resistance in a circuit opposes the flow of electric current, measured in ohms.

Question 19

4 examples of factors affecting resistance

Answer 19

• material (copper - low resistance)
• length
• temperature
• diameter

Question 20

omhs law

Answer 20

V = IR
voltage = current x resistance

Question 21

omhs law proportional

Answer 21

when I increase voltage increases
when I decrease voltage decreases
When R increases voltage increases
when R decreases voltage decreases

Question 22

features of an atom

Answer 22

neutron
proton
electron

Question 23

protons

Answer 23

in the middle of the nucleus
positive charge
attracted to electrons
atomic number
same number as electrons

Question 24

electron

Answer 24

around the middle of the nucleus
negative charge
attracted to protons
atomic number
same number as protons

Question 25

neutron

Answer 25

in the middle of the nucleus
no charge
not attracted to anything
atomic mass
approx same number as protons

Question 26

what is electricity

Answer 26

Electricity requires the movement of charged particles
The charged particles that move around in an atom are electrons
This allows electric charge to flow

Question 27

what is electric charge

Answer 27

when opposite charges attract and like charges repel. This is the electrostatic force between pos and neg charges

Question 28

2 types of electric charge

Answer 28

pos, neg

Question 29

what do batteries do

Answer 29

increase the voltage of a electron