Monday. 12, 2018 Friday March 16, 2018 Name ANSWER QUESTION 1 AND ANY 4 OF 5 QUE

Question

Monday. 12, 2018 Friday March 16, 2018 Name ANSWER QUESTION 1 AND ANY 4 OF 5 QUESTIONS Data:i" k-9x109 Nm'C' ; e-1.602 x 10", c; 4°8.86 x 10.2 Fin ; E-kar Fe kq,.q2/r122 e = tan-1(Fr/F.) m.. 9.11x 10, kg F=mv2lr KE.wmv.2 1) Three charges q1, q2, and q3 are inibally at infinity Calculate the total energy required to place them at the comers of the right angle triangle shown below. The dimensions of the triangle are as indicated and the values of the charges are given below q1 q2 q3 0.94 m 0.5 m 0.8 m q2 q3 2) A charged particle QA is located at the origin. Point P lies 15 cm to the right of the charge along the x-axis. If a second charge Qe is placed 8 directly below point P, calculate the total electic field at point P. The values of the charges are given below 15 cm Q -6 x10-7 C QA x 10*J 3) Four point charges have the same magnitude of 2 0-1012C and are fixed to the corners of a square that is 8.0 cm on a side Three of the charges are positive and one is negative Determine the magnitude of the net electric field that exists at the center of the square

Explanation / Answer

here,

1)

q1 = 5 * 10^-6 C

q2 = 8 * 10^-6 C

q3 = - 4 * 10^-6 C

the total energy required , E = K * q1 * q2 /0.5 + K * q2 * q3 /0.8 + K * q3 * q1 /0.94

E = 9 * 10^9 * 10^-6 * 10^-6 (5 * 8/0.5 - 8 * 4 /0.8 - 5 * 4 /0.94 ) J

E = 0.169 J

the total energy required is A) 0.169 J

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