A uniform electric field with a magnitude of 1300 N/C points in the negative x -

Question

A uniform electric field with a magnitude of 1300 N/C points in the negative x-direction, as shown in the figure below, where L = 1.0 cm.

(a) What is the difference in electric potential, V = VB VA, between points A and B?
V

(b) What is the difference in electric potential, V = VB VC, between points B and C?
V

(c) What is the difference in electric potential, V = VC VA, between points C and A?
V

(d) From the information given in this problem, is it possible to determine the value of the electric potential at point A? If so, determine VA; if not, enter "999".
V

Explanation / Answer

Here ,

Electric field , E = - 1300 N/C

L = 1 cm = 0.01 m

a) as AB is perpendicular to electric field

VB - VA = 0 V

b) for between B and C

VB - VC = - E * 4 L

VB - VC = -1300 * 4 * 0.01

VB - VC = -52 V

c)

for potential between C and A

VC -VA = VC - VB

as (VA = VB)

VC -VA = - (VB- VC)

VC -VA = 52 V

d)

No , it is not possible to find the value of electric potential at A

as zero of potential can't be defined

enter 999

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