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2 cards from this section. Quick, good the night before a test.
What is the formula to find the magnetic field at the center of a coil?
Consider the number of turns and how the current contributes.
Which hand rule is used to determine the direction of magnetic field lines?
Think about how you would position your thumb and fingers.
What is the expected direction of the magnetic field around a wire carrying current?
Think about how the field shapes around the wire.
True or False: A current-carrying wire experiences no force when it is parallel to the magnetic field.
Reflect on the relationship between angle and force.
A wire carrying 15 A runs perpendicular to a magnetic field of 0.3 T. How much force does it experience over a 2 m length?
Use the force equation considering the angle.
Two parallel wires, one carrying 10 A and the other 5 A, are 0.3 m apart. Calculate the force per meter on each wire.
Remember to apply the sign conventions based on current directions.
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