4) The potential as a function of position x is shown in the graph in the figure

Question

4) The potential as a function of position x is shown in the graph in the figure. Which statement than the electric field is true? A) The electric field is zero at x = 5cm, its magnitude is at a maximum at x = 0, and the field is directed to the right there. B) 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. C) The electric field is zero at x = 0, its magnitude is at a maximum at x = 15 an, and the field is directed to the left there. D) The electric field is zero at x = 0, its magnitude s at a maximum at x = 15 cm, and the field is directed to the right there. 3) Two point charges of +1.0 muC and -2.0 muC are located 0.50m apart. What is the minimum amount of work needed to move the charges apart to double the distance between them? (k = ¼ pi epsilon 0 = 8.99 x 10^9 N.m^2/C^2) A) + 18 mJ B) +36 mJ C) -36mJ D) 0 mJ E) -18 mJ

Explanation / Answer

3. potential energy U = Kq1q2/r

U = 9e9 * 1e-6* -2 e-6 /0.5

U = -36mJ

option C it is

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4. option D it is

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