q 7 Question 7 of 14 Incorrect Map Sapling Learning macmillan learning Pictured

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q 7

Question 7 of 14 Incorrect Map Sapling Learning macmillan learning Pictured on the right are two point charges Q!--60.0 and Q2 = 40.0 C separated by a distance D-10.0 cm, as shown. Calculate the potential at point A positioned d= 4.00 cm to the left of Q1 -60.0 40.0 C Number 5.53x 10*v O K4.00 cmOK10.0 cm Previous Give Up & View Solution Try Again Next Exit Explanation Potential is determined by TreasuryDirect - Home 0 where Q is the charge creating a potential, r is the distance from charge Q to the point in question, and Eo is the permtivity of free space. The potential is a scalar quantity, so the total potential at a point in space is simply the algebraic sum of all contributions to the potential from each source charge. By examining the figure, we can see that the total potential at point A is given by

Explanation / Answer

the electric potential v1 due to charge Q1 is

V1 = kQ1 / d

V1 = (9 x 10^9 x -60 x 10^-6) / (4 x 10^-2)

V1 = -1.35 x 10^7 V

the electric potential v1 due to charge Q1 is

V2 = kQ2 / (d + D)

V2 = (9 x 10^9 x 40 x 10^-6) / (0.14)

V2 = 2.57 x 10^6 V

V = V1 + V2

V =  -1.35 x 10^7 V +  2.57 x 10^6 V

V = -10.93 x 10^6 V

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