13.1 Magnetic fields

Question 1

what are the poles of the magnet

Answer 1

the places where magnetic forces are strongest

Question 2

what happens when two magnets are brought close together

Answer 2

they exert a force on each other

Question 3

do like/unlike poles attract or repel each other

Answer 3

like: repel
unlike: attract

Question 4

what type of force is attraction and repulsion between two magnetic poles

Answer 4

non-contact force

Question 5

what is an induced magnet

Answer 5

a material that becomes a magnet when it is placed in a magnetic field

Question 6

what does induced magnetism always cause

Answer 6

a force of attraction

Question 7

what happens when an induced magnet is removed from the magnetic field

Answer 7

it loses most/all of its magnetism quickly

Question 8

what is the magnetic field

Answer 8

the region around a magnet where a force acts on another magnet or on a magnetic material

Question 9

examples of magnetic materials

Answer 9

iron, steel, cobalt, nickel

Question 10

that does the strength of magnetic field depend on

Answer 10

distance from magnet

Question 11

what is the direction of the magnetic field at any point given by

Answer 11

the direction of the force that would act on another north pole placed at that point

Question 12

what is the direction of a magnetic field line

Answer 12

from the north (seeking) pole of a magnet to the south(seeking) pole of the magnet

Question 13

how does a compass work

Answer 13

• A magnetic compass contains a small bar magnet
• The Earth has a magnetic field
• The compass needle points in the direction of the Earth’s magnetic field