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Charge Distributions

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Electric Field on the Axis of a Ring of Charge

Ring of charge

Concept Check -- Second Configuration

Electric Field on the Axis of a Uniformly Charged Disk

Disk of charge

Step-by-Step Example: Infinite Line of Charge by Direct Integration

Step 1: Understand the geometry
Step 2: Span the charge distribution
Step 3: Evaluate the contribution from the infinitesimal charge element
Step 4: Exploit symmetry as appropriate
Step 5: Set up the integral
Step 6: Solve the integral
Step 7: The Result!

Another Example: Quiz 3, Fall'97

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Last updated Feb. 25, 1998.
Copyright George Watson, Univ. of Delaware, 1997.