ABC is a right angled A with AB = 3 cm, BC = 4 cm, AC= 5 cm. Charges of +15 stat. C, -12 and 20 stat Coulomb are placed at A, B, C respectively. The electric potential energy of three charges is:
(a) 120 ergs (b) -60ergs
(c) 4*5*3ergs (d) (20+15-12)ergs
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Answer:
120ergs
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