WorksheetsP7 Magnetism and Electromagnetism AQA (Combined)
Total questions: 31
Worksheet time: 16mins
Where are magnets strongest?
At the poles
At the top of the magnet
At the bottom of the magnet
In the middle of the magnet
Which type of force is a magnetic force?
Non-contact
Contact
What is a magnetic field?
The area around a magnet where a force acts on magnets or other magnetic materials
The area around a magnet where a force acts on all materials
The area around an object with mass where a force acts
The area around charged materials where a force acts.
What effect would two north poles have on each other?
Attract
Repel
What effect would two south poles have on each other?
Attract
Repel
What effect would a north and a south pole have on each other?
Attract
Repel
What is a permanent magnet?
A magnet that produces its own magnetic field
A material that becomes magnetic when placed inside a magnetic field
A material that becomes magnetic when it has a current running through it.
What is an induced magnet?
A magnet that produces its own magnetic field
A material that becomes magnetic when placed inside a magnetic field
A material that becomes magnetic when it has a current running through it.
Which of the following are magnetic materials? (Choose all correct answers)
Cobalt
Nickel
Iron and steel
Copper
Which of the following are NOT magnetic materials?
Steel
Cobalt
Copper
Aluminium
What is the direction of magnetic field?
North to south
South to north
North to north
South to south
What is a solenoid?
A coil of wire
A length of wire
A type of permanent magnet
A magnetic material
Where is the magnetic field strongest in a solenoid?
Inside the coil
At the ends of the coil
On top of the coil
Underneath the coil
Which TWO words describe the magnetic field of a solenoid?
Uniform
Concentrated
Large
Dispersed
Tick TWO correct answers:
The right-hand grip rule for the magnetic field of a wire states that:
The thumb represents the direction of the current
The thumb represents the direction of the magnetic field
The fingers represent the direction of the current
The fingers represent the direction of the magnetic field
Tick TWO correct answers:
The right-hand grip rule for the magnetic field of a solenoid states that:
The thumb represents the direction of the current
The thumb represents the direction of the magnetic field
The fingers represent the direction of the current
The fingers represent the direction of the magnetic field
Which statement best describes an electromagnet?
A solenoid surrounding an iron core
A solenoid surrounding a metal core
A magnet surrounding an iron core
A magnet surrounding a metal core
Which TWO are key features of an electromagnet?
Can be switched on and off
Strength can be modified
They are permanent magnets
They attract and repel
How do permanent magnets behave?
Can attract and repel other magnetic materials
Can only attract other magnetic materials
Can only repel other magnetic materials
Have no effect on other magnetic materials
How do induced magnets behave?
Can attract and repel other magnetic materials
Can only attract other magnetic materials
Can only repel other magnetic materials
Have no effect on other magnetic materials
Which of the following will NOT increase the strength of an electromagnet?
Increasing the number of coils
Increasing the current flowing through the circuit
Adding an iron core
Reversing the direction of the current in the circuit
What effect does reversing the direction of the current have on the magnetic field of an induced magnet?
The direction of the magnetic field is reversed
There is no effect
The magnetic field becomes stronger
The magnetic field becomes larger
Which THREE factors make up Flemming's left-hand rule?
Magnetic field
Current
Movement
Force
In Flemming's left-hand rule what does the thumb represent?
Force
Magnetic field
Current
Movement
In Flemming's left-hand rule what does the first finger represent?
Force
Magnetic field
Current
Movement
In Flemming's left-hand rule what does the second finger represent?
Force
Magnetic field
Current
Movement
Which of the following would NOT increase the force of an electric motor?
Increasing the number of coils
Increasing the strength of the magnet
Increasing the size of the magnet
Increasing the current
What is the role of a commutator?
Reverse the direction of the current every half turn
Reverse the direction of the magnetic field every half turn
Reverse the direction of movement every half turn
Reverse the direction of the force every half turn
Magnetic force is greater when distance is greater. True or false?
True
False
Which equation links current, force, length of wire and magnetic flux density?
force = magnetic flux density x current x length
magnetic flux density = force x current x length
current = magnetic flux density ÷ (length x force)
length = current ÷ (magnetic flux density x force)
What is the unit for magnetic flux density?
T
t
te
Te
