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WorksheetsMagnetism
Total questions: 25
Worksheet time: 1hrs 29mins
When a wire carrying an electric current is placed in a ________________, it may experience a force. The field from the fixed magnet ___________ with the field due to the current. This can cause the wire to be attracted or repelled from the fixed magnet you will see the effect of the attraction/repulsion in the ___________of the wire.
Thumb and first finger represent .......
magnetic field, force
force, current
force, magnetic field
current, force
The diagram show the direction of magnetic field,B and current, I.
By using Fleming left hand rules, determine the direction of Magnetic force, F.
left
downward
into the page
out from the page
The diagram show the direction of magnetic field,B and current, I.
By using Fleming left hand rules, determine the direction of Magnetic force, F.
no force produced
downward
into the page
out from the page
The diagram show the direction of magnetic field,B and current, I.
By using Fleming left hand rules, determine the direction of Magnetic force, F.
no force produced
right
into the page
out from the page
The diagram show the direction of magnetic field,B and current, I.
By using Fleming left hand rules, determine the direction of Magnetic force, F.
no force produced
right
downward
out from the page
The diagram shows a cross-section through a simple DC motor. Select the correct statement:
The loop will rotate clockwise
The loop will rotate anticlockwise
The slip rings aid commutation
The loop rotates the same way even if the battery is reveresed
When _______________ travels through a
conductor, a magnetic field is created
current
a magnetic field
neutrons
Electric currents produce _____________
electron clouds
magnetic fields
sound waves
Why might a current-carrying wire be placed between a magnetic field?
To increase the current from the interaction of magnetic fields
To increase the voltage from the interaction of magnetic fields
To produce a force from the interaction of magnetic fields
What does the thumb indicate in flemings left hand rule?
Force
Motion
Current
Magnetic field direction
What direction is the force/motion in the following diagram?
Perpendicular to the magnets
Downwards
Parallel and through the magnets
What angle must there be between a magnetic field and a conductor in order for the maximum force to be exerted?
180
45
90
270
Name one factor that does not affect the size of a force in on a current-carrying conductor placed in a magnetic field?
Gravity
Magnetic flux density/size of magnetic field
Size of the current
Length of the conductor
Name the effect that causes a coil of current-carrying wire in an electric motor to move.
The electromagnetism effect
The magnetic effect
The motor effect
Which rule can be used to work out which way a coil of wire rotates in a motor?
Fleming's left-hand rule
Fleming's right-hand rule
Give two ways you can reverse the direction of a basic dc motor?
Reverse the current
Keep the current the same
Reverse the magnetic field
Keep the magnetic field the same
