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2 cards from this section. Quick, good the night before a test.
Define drift velocity.
Think about how electrons move in response to an electric field.
What is the unit of electric current?
Recall the SI unit for measuring electric current.
What is the drift velocity?
Think about how potential difference influences electron movement.
True or False: Current can flow through a conductor without an applied potential difference.
Consider what initiates the flow of current.
A copper rod with a cross-sectional area of 1 mm² has 8.5 x 10²² free electrons per cubic meter. If these electrons drift with a velocity of 0.02 m/s, what is the current flowing through this rod?
Make sure to use the correct unit conversions.
If the drift velocity of electrons in a conductor is doubled while keeping the cross-sectional area and number of free electrons constant, how does the current change?
Recall how changes in drift velocity directly influence the current equation.
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