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26 Nov 2019
Consider the Cartesian plane below, with the three charges arrangedas follows:
+2Q@(0,+a) +2Q@(0,-a) -Q@(+a,0)
a)Derive a formula for the electric potential on the positivex-axis at x>a as a
function of x. Let electric potential equal zero at infinity.
b) Explain how this formula could be used to find a positive atwhich the electric
field is zero. | | O+2Q at y=+a | | | | | -------------------------------------O------------------------------- | -Q at x=+a | | | | O+2Q at y=-a | |
Consider the Cartesian plane below, with the three charges arrangedas follows:
+2Q@(0,+a) +2Q@(0,-a) -Q@(+a,0)
a)Derive a formula for the electric potential on the positivex-axis at x>a as a
function of x. Let electric potential equal zero at infinity.
b) Explain how this formula could be used to find a positive atwhich the electric
field is zero.
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O+2Q at y=+a
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-------------------------------------O-------------------------------
| -Q at x=+a
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O+2Q at y=-a
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