Unit 5 - Magnetism and electricity 2

Question 1

a unit where energy is transferred by chemical reactions to electrical energy

Answer 1

battery

Question 2

small negatively charged particle in an atom that orbits the nucleus

Answer 2

electron

Question 3

flow of negatively charged electrons

Answer 3

electric current

Question 4

a measure of the size of ‘push’ that causes a current to flow around a circuit

Answer 4

voltage

Question 5

part of an electric circuit e.g. a light bulb

Answer 5

component

Question 6

a material that transfers electrical charge by passing on energy to nearby particles

Answer 6

electrical conductor

Question 7

does not allow a current to pass

Answer 7

electrical insulator

Question 8

used to measure the current flowing in a circuit

Answer 8

ammeter

Question 9

unit of measurement of current

Answer 9

ampere (A)

Question 10

a measure of the size of ‘push’ that causes a current to flow around a circuit

Answer 10

voltage

Question 11

a unit of measurement of voltage

Answer 11

volt (V)

Question 12

a device used to measure the voltage across a component in a circuit

Answer 12

voltmeter

Question 13

difference in charge across a cell or battery

Answer 13

potential difference

Question 14

opposes the ‘push’ provided by the voltage in a circuit and is measured in ohms (Ω)

Answer 14

resistance (R)

Question 15

negatively charged particles that move freely within a metal

Answer 15

free electron

Question 16

the unit of measurement of electrical resistance (Ω)

Answer 16

ohm

Question 17

a circuit component that opposes the ‘push’ provided by the voltage in a circuit

Answer 17

resistor

Question 18

allows the amount of current flowing through a resistor to be changed

Answer 18

variable resistor

Question 19

the thin length of wire in a light bulb

Answer 19

filament

Question 20

a diagram or three dimensional object that makes an idea easier to understand

Answer 20

model

Question 21

comparison between one thing and another

Answer 21

analogy

Question 22

how the electricity supply in a house is connected

Answer 22

ring main

Question 23

a device that uses electricity

Answer 23

appliance

Question 24

household alternating-current electric power supply

Answer 24

mains supply

Question 25

a device that breaks a circuit when too high a current is drawn from the mains

Answer 25

circuit breaker

Question 26

temperature control switch

Answer 26

thermostat

Question 27

a circuit using a combination of series and parallel circuits

Answer 27

series-parallel circuit