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## General Physics II

by: Cayla Kilback

47

0

4

# General Physics II PHYS 408

Cayla Kilback
UNH
GPA 3.64

Staff

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COURSE
PROF.
Staff
TYPE
Class Notes
PAGES
4
WORDS
KARMA
25 ?

## Popular in Physics 2

This 4 page Class Notes was uploaded by Cayla Kilback on Thursday October 29, 2015. The Class Notes belongs to PHYS 408 at University of New Hampshire taught by Staff in Fall. Since its upload, it has received 47 views. For similar materials see /class/231704/phys-408-university-of-new-hampshire in Physics 2 at University of New Hampshire.

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Date Created: 10/29/15
Scalar Fields Scalar Fields lfwe assign a number to each location in space we have a scalar eld An other way of putting it is to assign a function S xyz S to each point in space Properties We usually deal With scalar elds that are well behaved ie no singularities infinites and no abrupt discontinuities sudden jumps Examples Temperature pressure gravitational potential electric potential 39TIO39 om EMSTURB IZE 231mm 7 Ra a Vec ror39 Fields Vector Fields If we assign a vector 3 numbers to each location in space we have a vector eld An other way of putting it is to assign a function V g to each point in space Properties We usually deal with vector elds that are well behaved ie no singularities infinites and no abrupt discontinuities sudden jumps no sudden breaks in Velocities in a uid Efield B eld Vec ror39 Fields examples SeaIce motion from radar 20 km ow enm 7 p444 xx11111111111 1111111111111vgt gg 111111111117777 VVVVYltltltltltlt vu Vltkavv4gt Axxxxisxxxx YltltLLFVVgt AAxxxssxxx A k k b b h p p t r i i gt gt i gt s s s Meteorology examgle Swiss Electric Field The electric eld is a vector eld that is de ned by the force divided by the charge that a small test charge would experience at any point in space F 4 s x E 0E Wl q C 0 Electric fields are real since they can store energy as we will see later Special Properties of Efields All the E eld vectors are along the tangents of lines which we call the electric eld lines The electric field lines all start on a positive charge and end on a negative charge The electric field lines can never cross For conductors the electric field lines always start or end perpendicular to the conducting surface Superposition for39 Electric Fields For multiple charges the electric elds will add as a vector sum gt E 0EIEZZEZ Efield due to a point charge F 1 qng 47r80 r 1 E 12 4350 r Electric Field for a dipole p It is customary to have the direction of the p vector point from the to the charge

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