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2 cards from this section. Quick, good the night before a test.
What is the formula for calculating the magnetic force on a current-carrying wire?
Think about each component in the formula.
What happens to the magnetic force when the current increases?
Consider how current influences the formula.
What is the formula for the magnetic force on a current-carrying wire?
Remember all components involved in the calculation.
The left-hand rule is used to find the direction of which force?
Think about how the direction of current relates to the force.
A wire carrying a current of 10 A makes an angle of 30° with a magnetic field of strength 2 T. Calculate the magnetic force acting on the wire if its length in the field is 5 m.
Remember that sin(30°) equals 0.5.
Determine the angle at which a wire will experience no magnetic force when placed in a magnetic field.
Think about how sin behaves at these angles.
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