Question

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a) An equilateral triangle has all "legs" equal to 12mm Two charges of +6 C are placed on the vertex of each leg with the base. One charge of -8 uC is place on the perpendicular bisector. What is the Electric Potential value (Voltage) at the top of the triangle (point P) 12 12 mm 1 6 mm 46 aC Blectric Petential b) The graph to the right shows the Electric Potential (Voltage) s for a certain group of charges. What would be the Electie Be sure to hewup of charges. What would be the Electric field between Voltags Y in kV 25 kV A to B: 15 kV 5kV 。 0 0.2 0.4 0.6 0.8 x (met B to C: Eac C to D: ECD=- A large industrial capacitor has capacity of 15 mF (milliFarads). If it is operated at 220 Volts, ge is stored on the plates of this capacitor? ISX 000

Answer 1

R = 12 sin (60 degree) = 10.39 mm Potential at point P v = sigma 1/4 pi epsilon_0 q_i/r_i = 1/4 pi epsilon_0 [q_1/r_1 + q_2/r_2 + q_3/r_3] = 9 times 10^9 [6 times 10^-6/12 times 10^-3 + - 8 times 10^-6/10.39 times 10^-3 + 6 times 10^-6/12 times 10^-3] = 9 times 10^6 [6/12 - 8/10.39 + 6/12] = 2.07 times 10^6 volt V = 2.07 times 10^6 volt