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Lecture 24b

# Lecture 24b - The relationship between Electric Field[E and...

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The relationship between Electric Field [E] and Electric Potential [V] (Voltage) More about conductors

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Recap: Electric Potential [V] at a point in space is the work I have to do to bring unit + charge from ∞ to that point Potential landscape: Positive Charge Negative Charge V is +ve near a +ve charge V is ve near a ve charge
Electric Potential Difference V A Work per unit charge I do to bring charge from to point A. V B Work per unit charge I do to bring charge from to point B. E R B A V B ̶ V A = Work I do to move unit charge from A to B q(V B ̶ V A ) = work I do to move charge q from A to B = 𝚫 U sys If I move along an equipotential, I do no work!

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Q: It takes the most work to move a positive charge A. From P to point 1 B. From P to point 2 C. From P to point 3 D. From P to point 4 E. They all require the same amount of work
+Q +q F el F DP Work out for point charge 𝑉 ?

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