Chapter 2553P25.2∆∆KqV=737 1011517.×=−qafq=×−641 1019. CP25.3(a)Energy of the proton-field system is conserved as the proton moves from high to lowpotential, which can be defined for this problem as moving from 120 V down to 0 V.KU EK Uiiff++= +∆mech001202=+qVmvp160 10120112167 1019272..×⋅FHGIKJ−−C VJ1 V Ckgejvpvp152 105ms(b)The electron will gain speed in moving the other way,from Vi=0 to Vf=120 V :ff∆mech000122++=+mvqVe0129 11 101 60 1012031219+−×kgCJ Cejbgveve649 106msP25.4WKqV==−0129 11 104 20 101 60 10315219−××=−−×.kgm sCej∆VFrom which, ∆V=−0502V.Section 25.2Potential Difference in a Uniform Electric FieldP25.5(a)We follow the path from (0, 0) to (20.0 cm, 0) to (20.0 cm, 50.0 cm).∆U(work done)
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .