Physics 9

Question 1

Static electricity

Answer 1

Electric charge that is collected and held in one place

Question 2

What happens when two material are rubbed together

Answer 2

Depending on material one might lose and the other might gain electrons

Question 3

What happens when electrons are rubbed off a material

Answer 3

The material becomes positively charged

Question 4

What happens when a material gains electrons

Answer 4

It becomes negatively charged

Question 5

Friction

Answer 5

Charging a material by rubbing

Question 6

Uncharged material

Answer 6

Prior to being rubbed together - equal numbers of protons and electrons
Electrically neutral

Question 7

Charged materials

Answer 7

If electrons are rubbed off protons stay behind and material is electrically charged, vice versa for losing protons

Question 8

Laws of electric charge

Answer 8

Opposite charges attract
Like charges repel
Charged objects attract neutral objects

Question 9

Static charge

Answer 9

Electric charge at rest

Question 10

Electrostatics

Answer 10

Study of static charge

Question 11

SI unit of electric charge

Answer 11

Coulomb (C)

Question 12

Conduction

Answer 12

Charging when objects touch

Question 13

Induction

Answer 13

Objects are charged without touching

Question 14

Insulator

Answer 14

Substance where the electrons are so tightly bound to the atoms making up the material
Ex. Plastic

Question 15

Conductors

Answer 15

Allow electrons to flow freely from one atom to another

Ex. metals

Question 16

Semi conductors

Answer 16

Allow electrons to move, although there’s some resistance

Ec. Carbon, silicone

Question 17

Current electricity

Answer 17

Electrical charge in motion

Question 18

Source

Answer 18

Source of electrical energy

Question 19

Conductor

Answer 19

Wire that electric current flows through

Question 20

Load

Answer 20

Device that transforms electrical energy into other forms of energy

Question 21

Switch

Answer 21

Device that can turn the circuit on/off

Question 22

Ammeter

Answer 22

Used to measure electrical current in a circuit

Question 23

Voltmeter

Answer 23

Used to measure the voltage in a circuit

Question 24

Energy

Answer 24

The ability to do work

Question 25

Potential energy

Answer 25

Stored energy that has the potential to make something move of change

Question 26

Electric potential

Answer 26

Energy carried by elecric charges

Question 27

Electrochemical cell

Answer 27

Battery that converts chemical energy into electric energy

Question 28

Different in potential energy per coulomb of charge between two points of an electric circuit is

Answer 28

Voltage or potential difference

Question 29

Kirchoff’s law

Answer 29

Vt = v1 + v2

Question 30

Parallel circuit formla

Answer 30

Vt = v1 = v2

Question 31

Voltage, resistance and current formulas

Answer 31

V = i x r
r = v/i
i = v/r

Question 32

Power, voltage, time, resistance, energy, current formulas

Answer 32

v = p/i
t = e/o
e = p x t
i = p / v
p = v x i
p = e / i

Question 33

1000 mA

Answer 33

1 A

Question 34

Electrochemical cell

Answer 34

Provides energy to push the negative charges through the conductors which are connected together

Question 35

Dry cell

Answer 35

Moist paste-like substance and an electrolyte

Alkaline batteries

Question 36

Wet cell

Answer 36

Solution is used as an electrolyte

Car batteries

Question 37

Energy gormula

Answer 37

E = v x i x t
E = p x t

Question 38

1000 w

Answer 38

1 kw

Question 39

3600s

Answer 39

1 h`

Question 40

2 power formulas

Answer 40

p = v x i
p = e / t