N5 Exam Prep

Question 1

Define Power

Answer 1

The rate at which energy is transferred or work is done

Question 2

Define Voltage

Answer 2

The potential difference across a cell, electrical supply or electrical component

Question 3

What is the mains voltage in the UK?

Answer 3

230V

Question 4

Define Specific Heat Capacity

Answer 4

The amount of energy required to raise the temperature of 1kg of substance by 1 degrees Celsius.

Question 5

What is a conductor?

Answer 5

A material which allows electrical charge to pass through it easily

Question 6

What is an insulator?

Answer 6

Material that does not allow charge or heat to pass through is easily

Question 7

What kind of energy is supplied by a battery?

Answer 7

Chemical energy

Question 8

Define current

Answer 8

Electrical charge moving through a circuit

Question 9

What is mass?

Answer 9

The amount of matter an object contains, measured in kg

Question 10

Define gravitational field strength

Answer 10

The force per unit mass measured in newtons per kg

Question 11

What is ‘absolute zero’ in degrees Celsius?

Answer 11

-273 degrees c

Question 12

Define weight

Answer 12

The force acting on an object due to the pull of gravity from a massive object like a planet

Question 13

Define frequency

Answer 13

The number of waves produced each second, measured in hertz

Question 14

Define Wavelength

Answer 14

The length of a single wave measured from crest to crest

Question 15

Define velocity

Answer 15

The speed of an object in a particular direction

Question 16

Define vacuum

Answer 16

A volume that contains no matter

Question 17

Define infrared

Answer 17

The range of invisible radiation wavelengths. With a longer wavelength than light but a shorter wavelength than radio waves .

Question 18

Define acceleration

Answer 18

The rate of change in speed measured in metres per second

Question 19

What is a geostationary satellite?

Answer 19

A satellite which orbits a planet at the same rate as the planet.

Question 20

How do convex lenses help people’s eyesight and which group do they help?

Answer 20

Long sighted people as they diverge light away from one point

Question 21

How do concave lenses help people’s eyesight and which group do they help?

Answer 21

Short sighted people because they concentrate light onto one point

Question 22

Define totally internal reflection

Answer 22

Process by which a light Ray is reflected off the inside of a material rather than being refracted to the outside

Question 23

What is a neutron?

Answer 23

An uncharged subatomic particle with a mass of 1 relative to a proton

Question 24

What is beta radiation

Answer 24

A type of ironing radiation consisting of a single electron

Question 25

What is Alpha Radiation

Answer 25

A type of ionising radiation consisting of 2 protons and 2 neutrons

Question 26

What is contained inside an atom

Answer 26

An atom consists of a nucleus containing protons and neutrons, surrounded by electrons.

Question 27

Define Kinetic Energy

Answer 27

The energy which moving objects have

Question 28

Define Fusion

Answer 28

The process by which energy can be released when two smaller nuclei fuse together to form a larger nucleus

Question 29

Define Nuclear Fission

Answer 29

The process by which energy is released when a large atom is hit by a neutron, becomes unstable and splits into two or more smaller pieces plus two or three neutrons

Question 30

Define Resistance

Answer 30

Resistance is the electrical property of a material that makes the moving charges deplete their energy