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This quiz contains 8 questions from a mix of 1 subtopics.
motor / engine / current
A carrying wire in the presence of a magnetic field will experience a force. This is called the effect.
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parallel / perpendicular
To experience the full force, a current carrying wire must be placed to the magnetic field.
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Fleming's left hand rule can be used to tell us the direction of the force experienced by a current carrying wire in a magnetic field.
In the diagram above, match the letters A to C with what they represent in Fleming's left hand rule:
Direction of the current:
Direction of the force:
Direction of the magnetic field:
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Use Fleming's left hand rule to find the direction of the force experienced by the wire.
The force is:
To the left
To the right
Downwards
Upwards
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The force (F) experienced by the wire is determined by:
- The current (I) in the wire
- The magnetic field strength (B). This is also called magnetic flux density.
- The length (L) of the wire that crosses the magnetic field.
The formula to calculate the force is:
(Note: this formula is given to you in the exam)
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The magnetic field strength (also known as magnetic flux density) is measured in:
Teslas (T)
Volts (V)
Amperes (A)
Coulombs (C)
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A wire carrying a current of 2 A is perpendicular to a magnetic field of 15 T.
The length of the wire in the field is 0.2 m.
What is the force experienced by the wire?
N
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A wire carrying a current of 6 A is perpendicular to a magnetic field of 30 T.
The length of the wire in the field is 0.1 m.
What is the force experienced by the wire?
N
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