Magnetism 4.5 / 5 based on 3 ratings ? ChemistryMagnetsGCSEEdexcel Created by: Jazzy15Created on: 27-03-19 12:14 Every magnet has 2 poles, what are these called ? North and South 1 of 37 A magnet which is free to move will always line up in a, what direction ? In a north-south direction 2 of 37 Where is the magnetic forces to where it is the strongest ? At the poles of the magnet 3 of 37 What happens when two magnets are brought close together ? They exert a force on one another 4 of 37 Which sides repel each other ? South and south. North and north. 5 of 37 Which sides attract each other ? North and south 6 of 37 What is a magnetic field ? A region around a magnet where it will exert a force on another magnet or on a magnetic material 7 of 37 Give examples of magnetic materials e.g. iron, steel, cobalt or nickel 8 of 37 Why do we use plotting compasses ? To investigate the magnetic field around a bar magnet 9 of 37 Which way do magnetic field lines point ? Point from the north of a magnet to its south pole 10 of 37 What does the direction of the magnetic field show ? The direction of the force that would be exerted on a north pole that was placed at that point in the field 11 of 37 Where is the magnetic field stronger ? Where the field lines are closer together 12 of 37 A uniform magnetic field has the same _ and _ strength and direction everywhere 13 of 37 The earth has a what ? a magnetic field 14 of 37 What will a compass needle do ? Will always point in the direction of the Earth's magnetic field 15 of 37 what does the north pole of a compass point to ? Earth's magnetic south pole 16 of 37 What is a permanent magnet ? It produces its own magnetic field and it always has a north and south pole 17 of 37 If a magnet is permanent it can be both _ and _ by another magnet ATTRACTED to and REPELLED by another magnet 18 of 37 When does an induced magnet become magnetic ? When it is placed into a magnetic field 19 of 37 If a magnet is induced then it will only be ATTRACTED to what ? a permanent magnet 20 of 37 What does the strength of a magnetic field depend on ? The size of the current + distance from wire 21 of 37 What does a current flow through ? A wire 22 of 37 MF and current carrying wire - When a current flows through a wire, a magnetic field will be produced around what ? a wire 23 of 37 MF of a solenoid - What is the solenoid ? a coil of wire that carries current and acts like a magnet so that a movable core is drawn into the coil when a current flows 24 of 37 Inside the coil (solenoid) the magnetic field lines are what ? Evenly spaced apart and pointing in the same direction 25 of 37 Inside the coil (solenoid) the magnetic field is almost what ? Uniform 26 of 37 What is strongest in the coil (solenoid) ? The magnetic field 27 of 37 The magnetic field outside the coil (solenoid) is ? Non-uniform 28 of 37 Outside the coil (solenoid) the field lines change in what way ? They change direction + are not evenly spaced 29 of 37 Is the outside of the coil (solenoid) the magnetic field weaker or stronger ? Weaker 30 of 37 How do we create an electromagnet ? We can place an iron core into a solenoid 31 of 37 What rule do we use for a straight wire ? Right hand grip rule 32 of 37 What rule do we use for a solenoid ? Right hand grip rule 33 of 37 The strength of the magnetic field produced around a solenoid can be increased by what ? 1st point Increasing the current 34 of 37 The strength of the magnetic field produced around a solenoid can be increased by what ? point 2 Using more turns of wire 35 of 37 The strength of the magnetic field produced around a solenoid can be increased by what ? point 3 Moving the turns closer together 36 of 37 The strength of the magnetic field produced around a solenoid can be increased by what ? point 4 putting a soft iron core into the middle of a solenoid 37 of 37
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