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- 1. Multiple Choice
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
- 2. Multiple Choice
What does the thumb indicate in flemings left hand rule?
Force
Motion
Current
Magnetic field direction
- 3. Multiple Choice
What direction is the force/motion in the following diagram?
Perpendicular to the magnets
Downwards
Parallel and through the magnets
- 4. Multiple Choice
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
- 5. Multiple Choice
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
- 6. Multiple Choice
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
- 7. Multiple Choice
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
- 8. Multiple Choice
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
- 9. Multiple Choice
What does the thumb indicate in flemings left hand rule?
Force
Motion
Current
Magnetic field direction
- 10. Multiple ChoiceThe current in the green wire flows from the left to the right. What direction does the wire move?UpDownInto the pageOut of the page
- 11. Multiple Choice
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
- 12. Multiple Choice
The magnetic field inside a long straight solenoid carry
ing current is
Zero
decreases as we move towards its end
increases as we move towards its end
the same at all points
- 13. Multiple Choice
Fleming left hand rule gives the direction of:
Magnetic field
Current
Induced Current
Motion (Force)
- 14. Multiple Choice
The magnetic field lines near a long straight wire carrying current are:
Straight lines
Concentric rings
Spiral lines
Radial lines
- 15. Multiple Choice
Which of the following is not the source of magnetic field:
Moving charge
Electric current
Magnet
A small piece of iron
- 16. Multiple Choice
Magnetic field is maximum:
At Two Poles
At one pole
At The center of the magnet
Outside the magnet
- 17. Multiple Choice
What is the pattern of magnetic field lines at the center of a current carrying solenoid:
Concentric rings
Straight lines
Curved lines
Radial lines
- 18. Multiple Choice
Force experienced by a current carrying conductor placed in a magnetic field is
Perpendicular to its length
Perpendicular to its magnetic field
Perpendicular to its length & magnetic field
Perpendicular to its width
- 19. Multiple ChoiceWhich rule do we use to predict the direction a current carrying wire will move in a magnetic field?Fleming's Left Hand RuleFleming's Right Hand RuleFaraday's Left Hand RuleFaraday's Right Hand Rule
- 20. Multiple ChoiceIn Flemings Left hand rule what does the thumb point in the direction of?The direction of the magnetic fieldThe direction of the currentThe direction of the force (movement)None of these
- 21. Multiple Choice
A magnetic field like this is called...
a parallel field
a distorted field
a uniform field
a paramagnetic field
- 22. Multiple Choice
What direction does the wire move?
Up
Down
Left
Right
- 23. Multiple Choice
What direction would the wire move?
Up
Down
Left
Right
- 24. Multiple Choice
What direction would the wire move? (What direction does the force act?)
Up
Down
Left
Right
- 25. Multiple Choice
What direction does the force act?
Up
Down
Left
Right
- 26. Multiple ChoiceWhat will happen when these magnets are brought close together?They will attract each other.They will repel each other.Both magnets will turn to the leftBoth magnets will turn to the right
- 27. Multiple Choice
Thumb and first finger represent .......
magnetic field, force
force, current
force, magnetic field
current, force
- 28. Multiple Choice
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
- 29. Multiple Choice
If a conductor is wound into a coil and a current is passed through it creating a magnetic field, what is it known as?
Bar Magnet
Solenoid
Polarnoid
Transformer
- Answer choicesTagsAnswer choicesTags