9 PotentialtoField

# 9 PotentialtoField - Craig Ogilvie Where we stand Ways to...

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Unformatted text preview: Craig Ogilvie Where we stand Ways to calculate E-field Coulomb law, vector superposition Use symmetry to find field => Gauss law From E, can calculate V, Craig Ogilvie 11 q generates E-field, V in all space 2nd q experiences force due to E-field, has potential energy due to V = enclosed q A d E l d E V f i - = Craig Ogilvie Question: Climb down at fastest rate, 1st round Craig Ogilvie 22 Stand at point X, which direction would you walk to climb down at fastest rate? 1. N 2. S 3. E 4. W x N 1 of 30 Craig Ogilvie Question: Climb down at fastest rate, 2nd round Craig Ogilvie 33 Stand at point X, which direction would you walk to climb down at fastest rate? x N Fastest change in height = largest gradient 1 2 3 4 0% 100% 0% 0% 1. N 2. S 3. E 4. W 1 of 30 Craig Ogilvie E-field direction perpendicular to equipotentials Craig Ogilvie 44 O bj1 0 3 E-field given by gradient of V(x,y,z) Direction: most rapid change of potential Equipotential line connects points same V E-field is in direction of V change E-field perpendicular to equipotential Craig Ogilvie Question on V, 1st round Craig Ogilvie...
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## This note was uploaded on 09/20/2011 for the course PHYS 222 taught by Professor Johnson during the Spring '07 term at Iowa State.

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9 PotentialtoField - Craig Ogilvie Where we stand Ways to...

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