Electricty

Question 1

What is energy

Answer 1

Energy is the ability to do work

Question 2

Difference between kinetic and potential energy

Answer 2

●is energy in motion or movement(kinetic)

●is energy at rest or stored energy(potential)

Question 3

Name the 4 different types of energy

Answer 3

●potential. ●heat
●kinetic ●light

Question 4

Define static

Answer 4

Means stationary or not moving

Question 5

Define electricity

Answer 5

Electricity is the flow of charge

Question 6

Define static electricity

Answer 6

Is the build up of charge on the surface of an object

Question 7

What is friction

Answer 7

Friction is a force that opposes motion

Question 8

What causes friction

Answer 8

It occurs when 2 objects or materials rub against friction occurs

This friction causes electrons to transfer from atoms of one materail to the other

Question 9

Difference between open circuit and closed circuit

Answer 9

●an open circuit is one which does not allow electricity to pass through (a gap is created when switch is of)

●a closed circuit is one which allows electricity to pass through

Question 10

Define cell, fuse,buzzer, resistor,variable resistor, conductor

Answer 10

●cell-source of electricity

●conductor-a wire that allows electricity to pass through

●resistor- a device which changes electrical energy to other forms of useful energy

●variable resistor-is one whose resistant change is controlled by a daily

●buzzer-is a type of resistor that produces sound

●fuse-is a protective device which prevents electrical fires and above heated appliances

Question 11

What is electrical current

Answer 11

Flow of electricity charges in a circuit

Question 12

List component of a cicuit

Answer 12

Cell. Conductor
Switch. Resistor

Question 13

Define ameterand volt meter

Answer 13

An instrument that measures the current in a circuit the unit it measures are ampires(ameter)

Is a instrument that measures voltage across any 2 points in a circuit

Question 14

Name the 3 effects of current electricity

Answer 14

Heating effect
Magnetic effect
Chemical effect

Question 15

What are fuses made up of

Answer 15

Thin wire with low heating point and placed in a glass tubing

Question 16

Define short circuit

Answer 16

Occurs when current flows following a path with the least resistant

Question 17

How does fusion work

Answer 17

The fuse melts creating a gap when this happens the device stops working preventing a fire

Question 18

2 types of circuits

Answer 18

[Series circuit] is one where the components are arranged next to each other

[Parallel circuit] is one where the components are arranged one below the other and has more than one pathway

Question 19

Characteristics of a series circuit

Answer 19

●it has only one pathway[disadvantages]
●it is uniform[advantage]
●if one component of the circuit stops working the whole circuit will stop working

Question 20

Characteristics of parallel circuit

Answer 20

●the components are arranged one below the other(disadvantages)
●the current flowing in each pathway is unique(advantages)

Question 21

Define visible light

Answer 21

This is light that can be preceieved by our eyes also known as white l8ght

Question 22

Define spectrum of visible light

Answer 22

This refers to the full range of colors which make up the visible white light

Question 23

Define the following
Refraction
Dispersion

Answer 23

Refraction is the bending of light when it changes media

Dispersion is splitting of lighting the seven colours of the ranibow

Question 24

Difference between ,nonluminous luminous and illuminous

Answer 24

Luminous refers to object that can give of their own light

Nonluminous opposite of luminous

Illuminous is provision of light from a source

Question 25

ROYGBIV

Answer 25

Red orange[longest wavelengths]

yellow green[intermediate wavelengths]

blue indigo violet[shortest wavelengths]

Question 26

What speed does light travell

Answer 26

300 000km/sec

Question 27

Four properties of light

Answer 27

♡[Radiation]-when a body or object
has a lot of light and heat energy that it can give off to anthor object

♡[absorbastion of light]-an object absorbs white light made up of the seven colors of the rainbow the object absorbs all the other colors except one color that is reflected giving it of as the colour of the object

♡[reflection] is bouncing back of light give rise to an image being formed

♡[refraction]is the bending of light when it changes medium