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WorksheetsElectromagnetism and Motors End of Topic Quiz
Total questions: 19
Worksheet time: 26mins
The earth is like a magnet because:
It has a magnetic field due to its core
it has a magnetic field do to its crust
There is a magnetic pole in the earth's core
Gravity generates a magnetic field
Are the magnetic field lines in the picture correct?
Yes, because they point from north to south.
No, because they point from north to south (they're supposed to go the other way).
Yes, because the North pole is on the left in all pictures.
No, because the North pole is on the left in all pictures (it's supposed to be on the right).
How can the strength of an electromagnet be increased? (mark all that apply)
increase the current flowing through the coil
increase the number of coils
add an amplifier to it
put iron core inside the coil
What does the thumb indicate in flemings left hand rule?
Force
Motion
Current
Magnetic field direction
How does a split ring commutator work?
Swaps the contact evert full turn, so that the left-hand and right-hand arms of the coil always experience a force in the same direction.
Swaps the contact evert half turn, so that the left-hand and right-hand arms of the coil do not experience a force in the same direction.
Swaps the contact evert half turn, so that the left-hand and right-hand arms of the coil always experience a force in the same direction.
What needs to be present for motion to occur in the motor effect? Tick all that apply
Air
Magnetic field
Current
A conductor
A turning force
In this diagram, which way is the current flowing?
Into the page
Out of the page
Left to right
Right to left
What direction does the wire move?
Up
Down
Left
Right
What direction does the force act?
Up
Down
Left
Right
The diagram show the direction of magnetic field,B. The current is going into the page.
By using Fleming left hand rules, determine the direction of Magnetic force, F.
no force produced
right
into the page
out from the page
Magnetic field produced around a straight conductor due to current in it is given by
Fleming's right hand rule
Right hand grip rule
Clock rule
Fleming's left hand rule
b) based on the diagram above, choose the direction of the forces that act on the sides AB and CD of the coil.
AB:UPWARD;CD:DOWNWARD
AB:DOWNWARD;CD:UPWARD
A 2.0 m wire segment carrying a current of
0.60 A oriented parallel to a uniform magnetic field of
0.50 T experiences a force of what magnitude?
0
0.15 N
0.30 N
6.7 N
What is the magnetic force exerted on a 3.50 𝑚 length of wire carrying a current of 1.20 𝐴 perpendicular to a
magnetic field of 0.890 𝑇?
6.5 N
4.25 N
3.74 N
1.75 N
