The following figure shows a graph of V versus x in a region of space. The poten

Question

The following figure shows a graph of V versus x in a region of space. The potential is independent of y and z.(Figure 1)

Part A

What is Ex at x=?2m?

Express your answer to two significant figures and include the appropriate units.

Part B

What is Ex at x=0m?

Express your answer to two significant figures and include the appropriate units.

Part C

What is Ex at x=2m?

Express your answer to two significant figures and include the appropriate units.

The following figure shows a graph of V versus x in a region of space. The potential is independent of y and z.(Figure 1) Part A What is Ex at x=?2m? Express your answer to two significant figures and include the appropriate units. Part B What is Ex at x=0m? Express your answer to two significant figures and include the appropriate units. Part C What is Ex at x=2m? Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

Note that the electric field is the negative of the slope of the V vs x graph.

PART A:

At x = -2 m, the slope is -5 V/m, thus,

E = 5.0 i^ V/m   [ANSWER, PART A]

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For part B, using the same principle, the slope is 10 V/m. Thus,

E = -10 i^ V/m    [ANSWER, PART B]

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For part C, the slope is -5 V/m, thus,

E = 5.0 i^ V/m   [ANSWER, PART C]

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