Consider again the charge configuration described in Question 2: a charge at and a…

PHYSICS · Multi-part · CBSE · Physics · Electrostatic Potential and Capacitance · Electrostatic Potential and Capacitance

Problem

Consider again the charge configuration described in Question 2: a

+4.0\,\mu\text{C}

charge at

x=-0.15\,\text{m}

and a

-4.0\,\mu\text{C}

charge at

x=+0.15\,\text{m}

. Answer the following questions qualitatively—no numerical calculation is required. (a) For locations restricted to the

x

-axis, identify the sign (positive, negative, or zero) of the electric potential in each of the three regions: Region I (

x<-0.15\,\text{m}

), Region II (

-0.15\,\text{m}<x<+0.15\,\text{m}

), and Region III (

x>+0.15\,\text{m}

). Provide a clear explanation based on the contributions from each charge. (b) For points on the

y

-axis (where

x=0

), determine whether the potential is positive, negative, or zero above the

x

-axis (

y>0

) and below the

x

-axis (

y<0

). Justify your answer conceptually rather than computationally. (c) On the basis of your answers to parts (a) and (b), describe the qualitative shape and location of the equipotential surface that corresponds to

V=0

in the plane of the two charges.

Related theory

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