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Transcript
Potential Along Axis of Ring of Charge
• Divide the charge distribution into
differential elements
• Write down an expression for
potential voltalge from a typical
element — treat as point charge
• Integrate!
dq
R’
dq
kdq
V = ò dV = ò
r
k
k
= ò dq = Q
r
r
Q
=k
2
2
R¢ + z