Magnetism (dr Spear)

Question 1

Ammeter

Answer 1

A device for measuring electric current in a circuit

Question 2

amps

Answer 2

Units of measurement of electric current, symbol A

Question 3

Atom

Answer 3

A neutral particle; everything is made of atoms

Question 4

Attract

Answer 4

Be pulled together, for example, opposite poles of a magnet attract and positive and negative charges attract

Question 5

Battery

Answer 5

Two or more electric cells joined together

Question 6

Cell

Answer 6

A chemical, store of energy which provides the push that moves charge around a circuit

Question 7

Conductor

Answer 7

A material that conducts charge or energy well, such as a metal or graphite

Question 8

Core

Answer 8

A rod of a magnetic material placed inside a coil to make the magnetic field of an electromagnet stronger

Question 9

Current

Answer 9

The flow of electrical charge (electrons) around a complete circuit per second

Question 10

Electric charge

Answer 10

A property of a material or particle that can be positive or negative

Question 11

Electric field

Answer 11

A region where a charges material or particle experiences a force

Question 12

Electromagnet

Answer 12

A temporary magnet produced using an electric current

Question 13

Electron

Answer 13

A negatively charged particle found in atoms. Electrons flow through a wire when a current flows

Question 14

Insulator

Answer 14

A material that does not conduct electricity or transfer energy well

Question 15

Lightning

Answer 15

A current through the air that produces light and sound

Question 16

Magnetic field

Answer 16

A region where there is a force on a magnet or magnetic material

Question 17

Magnetic field lines

Answer 17

Imaginary lines that show the direction of the force on magnetic material

Question 18

Magnetic material

Answer 18

A material that is attracted to a magnet, such as iron, steel, nickel, or cobalt

Question 19

Magnetise

Answer 19

Make into a magnet

Question 20

Motor

Answer 20

A component or machine that spins when a current flows through it.

Question 21

Negative

Answer 21

The charge on an electron, or on an object that has had electrons transferred to it

Question 22

Neutral

Answer 22

Describes an object or particle that has no charge, or in which positive and negative charges cancel out, giving no charge overall

Question 23

Neutron

Answer 23

A neutral particle found in atoms

Question 24

North Pole

Answer 24

The pole of the magnet that points towards the north

Question 25

Ohms

Answer 25

The unit of resistance

Question 26

Parallel

Answer 26

A circuit in which there are two or more paths or branches for the current.

Question 27

Positive

Answer 27

The charge on a proton, or on an object that has had electrons transferred from it.

Question 28

Potential difference

Answer 28

A measure of the push of a cell or battery, or the energy that the cell or battery can supply

Question 29

Proton

Answer 29

A positively charged particle found in atoms

Question 30

Rating

Answer 30

The value of potential difference at which a cell or bulb operates.

Question 31

Relay

Answer 31

Electrical device that uses current flowing through it in one circuit to switch on and off a current in a second circuit

Question 32

Repel

Answer 32

Be pushed away from each other, for example, like magnetic poles repel or like electrical charges repel

Question 33

Resistance

Answer 33

How difficult it is for current to flow through a component in a circuit

Question 34

Series

Answer 34

A circuit in which components are joined in a single loop

Question 35

South Pole

Answer 35

The pole of a magnet that points towards the south.

Question 36

Switch

Answer 36

A component that controls the current by making or breaking the circuit.

Question 37

Voltage

Answer 37

A measure of the strength of a cell or battery used to send a current around a circuit

Question 38

Voltmeter

Answer 38

A device for measuring voltage

Question 39

Volts

Answer 39

Units of measurement of voltage, symbol V