Lecture_05_-_no_quiz_answers

Lecture_05_-_no_quiz_answers - Lecture 5 1/18 Gravitation...

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Lecture 5 1/18 Gravitation vs Electrostatic Potential Energy Work done by gravity or the Coulomb force decreases the potential energy b a l d F a U b U U ) ( ) ( g m l E q Gravity Coulomb l g m E q a b
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Lecture 5 2/18 Electric Potential Energy of a Charge in Electric Field Coulomb force is conservative Work done by the Coulomb force is path independent Can associate potential energy U(r) to charge q 0 at any point r in space It’s energy! A scalar measured in Joules (J) l d E q dW dU l d E q dW 0 0 l d V q U W 0
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Lecture 5 3/18 Electric Potential Energy of a Charge (continued) i is the reference point choice of reference point (or point of zero potential energy ) is arbitrary i is often chosen to infinitely far ( ) l d E q dW dU l d E q dW 0 0 l d r i l d E q U i U r U U 0 ) ( ) ( 0
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Lecture 5 4/18 Potential Energy in the Field due to a Point Charge Electrostatic potential energy of a two-charge system From infinity r q q k l q q k dl l q q k l d r l q q k l d E q
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This note was uploaded on 03/14/2012 for the course PHYS 241 taught by Professor Wei during the Summer '08 term at Purdue.

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Lecture_05_-_no_quiz_answers - Lecture 5 1/18 Gravitation...

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