3/6/2017 11:55 PM 84.6/100 Gradebook Print calculator Periodic Table ouestion 8

Question

3/6/2017 11:55 PM 84.6/100 Gradebook Print calculator Periodic Table ouestion 8 of 10 A Sapling Learning 22.4 HC Pictured on the right are thee point charges Q1 22.4 AC, Q2 a -34.6 AC, and Qs 87.3 arranged according to the figure on the right. Calculate the potential at point A in the figure Number 60.1 cm 1.12x 10 87.3 pc 34.6 UC K 60.1 cm A Previous Give up & View solution Try Again o Next Exit -L Explanation 411 tr where the charge creating a potential, ris the distance from charge Qto the point in question, and eo is the permittivity of free space. The potential is scalar quantity, so the total potential point in space is simply the that the sum all contributions to the potential from each source charge. By examining the figure, we can see total potential at point A is given by 4TTE r where r, rz,and rsare the distances from each respective charge to the point in question. From this you should

Explanation / Answer

Potential V = k [q1/r1 + q2/r2 + q3/r3]

q1 = 22.4 * 10-6 C, q2 = -34 * 10-6 C, q3 = 87.3 * 10-6 C

r1 = 0.601 m, r2 = 0.849 m, r3 = 0.601 m

Potential V = 9 * 109 * [22.4 * 10-6/0.601 + -34 * 10-6/0.849 + 87.3 * 10-6/0.601]

= 1.28 * 106 V

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