P4.1

Question 1

Suggest 3 ways to create a stronger magnetic field around a solenoid

Answer 1

-increase the number of coils
-use a stronger current
-add an iron core

Question 2

what type of materials are magnetic?

Answer 2

metals

Question 3

what are the only magnetic metals?

Answer 3

iron, nickel and cobalt

Question 4

what kind of forces can magnets exert?

Answer 4

attraction or repulsion

Question 5

what happens to magnetic forces as you get further away from the magnet?

Answer 5

they get weaker

Question 6

how are other objects affected by magnets?

Answer 6

some objects become magnetised and they are always attracted

Question 7

what object can manipulate magnetic fields?

Answer 7

metals

Question 8

magnetic field

Answer 8

area of force created by the magnet

Question 9

what type of force is magnetism?

Answer 9

non-contact force

Question 10

what direction do magnetic fields flow?

Answer 10

from the north to south poles

Question 11

induced magnet

Answer 11

material that becomes a magnet when placed in a magnetic field

Question 12

electromagnet

Answer 12

object that becomes magnetic when an electric current passes through it

Question 13

solenoid

Answer 13

coil of wire

Question 14

how do you find the direction of the solenoid field?

Answer 14

RIGHT HAND GRIP RULE:
-fingers show direction of current
-thumb shows direction of north pole

Question 15

what type of force do induced magnets always cause?

Answer 15

forces of attraction

Question 16

describe magnetic field lines

Answer 16

-have a direction from north to south
-indicate a strong field where they are close
-show the shape of the field around a magnet

Question 17

describe induced magnets and how they work

Answer 17

-iron, nickel and cobalt are the only pure metals that can be turned into a magnet
-if these metals have not been turned into a permanent magnet they will still be attracted to a magnet if placed within its magnetic field

Question 18

what is the shape of the field around the wire?

Answer 18

a circular field

Question 19

what is the strength of a magnetic field like around a wire?

Answer 19

the magnetic field is strongest in the middle and it becomes weaker as you move away from the centre

Question 20

how do you figure out the direction of the field around a wire?

Answer 20

RIGHT HAND RULE:
-thumb shows direction of current
-fingers show direction of magnetic field

Question 21

what is the shape of the magnetic field of a solenoid?

Answer 21

similar to the magnetic field of a bar magnet