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2 cards from this section. Quick, good the night before a test.
Define the Biot-Savart law.
Think about how we relate current to magnetic fields.
What does the right-hand rule indicate?
Use your right hand to visualize.
What does the Biot-Savart Law describe?
Focus on the relationship between current and magnetic fields.
True or False: The magnetic field due to a current element is proportional to the distance from the current element.
Think about how gravitational fields behave.
A straight wire of length 1.5 meters carries a current of 4A. Calculate the magnetic field 2m away at a right angle to the wire.
Plan your variables before computing.
Derive the expressions for magnetic field due to a circular loop of current, at a point along its axis at a distance x.
Break down the circular motion into small increments for analysis.
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