Unit 5 - Magnetism and electricity 1

Question 1

the effect of magnet poles on magnetic material

Answer 1

magnetism

Question 2

a material or object that produces a magnetic field

Answer 2

magnet

Question 3

making scientific research available to others to repeat and debate

Answer 3

peer review

Question 4

a force that arises even though objects are not touching – this is due to the interaction of fields

Answer 4

non-contact force

Question 5

to pull towards another object

Answer 5

attract

Question 6

the end of a magnet which is called the north pole or the south pole

Answer 6

pole

Question 7

to push away from another object

Answer 7

repel

Question 8

a magnet that keeps its magnetism for a long time

Answer 8

permanent magnet

Question 9

an object that is attracted by a magnet and shows magnetic properties when in a magnetic field

Answer 9

temporary magnet

Question 10

a type of temporary magnet that is magnetic only when an electric current passes through it

Answer 10

electromagnet

Question 11

groups of atoms bound together that are aligned in the same magnetic direction

Answer 11

domain

Question 12

the space in which a magnetic material feels a magnetic force

Answer 12

magnetic field

Question 13

the ability of a solid to withstand a force

Answer 13

strength

Question 14

to show the shape and size of a (magnetic) field

Answer 14

field lines

Question 15

the piece of iron inside the coil of an electromagnet which makes the magnetic field stronger

Answer 15

core

Question 16

when different people may interpret the results of an investigation differently

Answer 16

subjective

Question 17

a measure of how good data is

Answer 17

reliability

Question 18

when repeat tests of an investigation made by the same experimenter give similar results

Answer 18

repeatability

Question 19

when an investigation method is repeated exactly and the same results are obtained by a different experimenter

Answer 19

reproducibility

Question 20

how close data is to the true value

Answer 20

accuracy

Question 21

how close measured values are for repeated results

Answer 21

precision

Question 22

magnetic domains within a (core) liquid line up to create a weak magnetic field

Answer 22

geodynamic theory

Question 23

magnetic field around the Earth

Answer 23

magnetosphere

Question 24

a stream of charged particles released from the upper atmosphere of the Sun

Answer 24

solar wind

Question 25

these are usually caused by the movement of electrons, which have a negative charge) moving in the opposite direction.

Answer 25

a flow of positive charge

Question 26

the iron bar inside an electric bell

Answer 26

armature

Question 27

the point at which a circuit is made e.g. a switch

Answer 27

contact

Question 28

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

Answer 28

circuit breaker

Question 29

this transfers energy by electricity and uses magnetic force to cause movement and do useful work

Answer 29

electric motor

Question 30

a wire carrying a current moves when placed in an electric field

Answer 30

motor effect

Question 31

current that always flows in one direction

Answer 31

direct current (D.C.)