The potential as a function of position x is shown in the graph in the figure. W

Question

The potential as a function of position x is shown in the graph in the figure. Which statement about the electric field is true? A The electric field is zero at x = 0, its magnitude is at a maximum at x = 5 cm, and the field is directed to the right there. B The electric field is zero at x = 5 cm, its magnitude is at a maximum at x = 0, and the field is directed to the right there. C The electric field is zero at x = 0, its magnitude is at a maximum at x = 15 cm, and the field is directed to the left there. D The electric field is zero at x = 10 cm, its magnitude is at a maximum at x = 5 cm. and the field is directed to the left there.

Explanation / Answer

electric field = -dV/dx

so it is the slope of V-x curve with a negative value

so EF will be zero at x = 0 and maximum at x = 10

so option A) is the correct answer

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