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Work done can also be determined by considering movement across equipotentials. This can be written as: AWby you = q(Vp2 – Vpi). VPi is the electric potential at point Pi. This tells us that the work done by you is dependent only on the magnitude and type (+ or -) of the electric charge you are trying to move, and the difference in electric potential from the ending point to the starting point. Both of these equations could yield positive or negative values for work. Positive work for you means that you (or some outside influence) are doing work against the field to move the charge. Negative work for you means that you aren't doing any work and the particle moves the way the field would naturally push or pull the charge. 3) Use the equations above that determines work and your sketches (for electric fields and equipotentials) to state if each of the situations below would be + or - work: a) Moving a + charge from a point of higher electric potential to one of lower electric potential. Explain your reasoning for this first case. b) Moving a - charge from a point of higher electric potential to one of lower electric potential. c) Moving a + charge from a point of lower electric potential to one of higher electric potential. d) Moving a - charge from a point of lower electric potential to one of higher electric potential.

Work done can also be determined by considering movement across equipotentials. This can be written as: AWby you = q(Vp2 – Vpi). VPi is the electric potential at point Pi. This tells us that the work done by you is dependent only on the magnitude and type (+ or -) of the electric charge you are trying to move, and the difference in electric potential from the ending point to the starting point. Both of these equations could yield positive or negative values for work. Positive work for you means that you (or some outside influence) are doing work against the field to move the charge. Negative work for you means that you aren't doing any work and the particle moves the way the field would naturally push or pull the charge. 3) Use the equations above that determines work and your sketches (for electric fields and equipotentials) to state if each of the situations below would be + or - work: a) Moving a + charge from a point of higher electric potential to one of lower electric potential. Explain your reasoning for this first case. b) Moving a - charge from a point of higher electric potential to one of lower electric potential. c) Moving a + charge from a point of lower electric potential to one of higher electric potential. d) Moving a - charge from a point of lower electric potential to one of higher electric potential.

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Equ-Potential lab.pdf Work done can also be determined by considering movement across equipotentials. This can be written as: AW by you = q(Vp2 – VP1). VPi is the electric potential at point Pi. This tells us that the work done by you is dependent only on the magnitude and type (+ or -) of the electric charge you are trying to move, and the difference in electric potential from the ending point to the starting point. Both of these equations could yield positive or negative values for work. Positive work for you means that you (or some outside influence) are doing work against the field to move the charge. Negative work for you means that you aren’t doing any work and the particle moves the way the field would naturally push or pull the charge. 3) Use the equations above that determines work and your sketches (for electric fields and equipotentials) to state if each of the situations below would be + or - work: a) Moving a + charge from a point of higher electric potential to one of lower electric potential. Explain your reasoning for this first case. b) Moving a - charge from a point of higher electric potential to one of lower electric potential. c) Moving a + charge from a point of lower electric potential to one of higher electric potential. d) Moving a - charge from a point of lower electric potential to one of higher electric potential. Last Revised 12/21/2015 Equipotential Surfaces – 3.2
Transcribed Image Text:Equ-Potential lab.pdf Work done can also be determined by considering movement across equipotentials. This can be written as: AW by you = q(Vp2 – VP1). VPi is the electric potential at point Pi. This tells us that the work done by you is dependent only on the magnitude and type (+ or -) of the electric charge you are trying to move, and the difference in electric potential from the ending point to the starting point. Both of these equations could yield positive or negative values for work. Positive work for you means that you (or some outside influence) are doing work against the field to move the charge. Negative work for you means that you aren’t doing any work and the particle moves the way the field would naturally push or pull the charge. 3) Use the equations above that determines work and your sketches (for electric fields and equipotentials) to state if each of the situations below would be + or - work: a) Moving a + charge from a point of higher electric potential to one of lower electric potential. Explain your reasoning for this first case. b) Moving a - charge from a point of higher electric potential to one of lower electric potential. c) Moving a + charge from a point of lower electric potential to one of higher electric potential. d) Moving a - charge from a point of lower electric potential to one of higher electric potential. Last Revised 12/21/2015 Equipotential Surfaces – 3.2
Expert Solution
Part a

ΔW = q (Vp2-Vp1)

Here q is +ve and (Vp2-Vp1) is also positive. Hence, Work done will be +ve.

Whenever a +ve charge particle moves in direction of field lines the work done is positive. 

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