quesion2

2. Three charges (Q1 = Q3 = 120.0nC, and Q2 = - 110.0nC) are arranged on the three vertices of a triangle. [a] Determine the electric potential energy of the 3-charge configuration. [b] How much work would you have to do to displace Q3 from its present position to infinity? Y [c] What is the electric potential at point P(x = 3.0, y = 0.0 cm) due to the two remaining charges Q1 and Q2? 4.0cm Q1 Q3 3.0cm of 3.0cm XDistance of (3.0 cm, 00 0(m ) from , = ( 3 + 3 ) cm = 6 cm = 6 x 10- 2 m Electric potential at ( 3.0cm, 0.0cm ) due to QI = LTTE ( 6 X 10 - 2 ) Electric potential at ( 3:0cm ,0.0cm ) due to Q2 Q 2 LTTE. X ( Distance of Q2 from the point ) Q 2 HTTE ( 2 x 10 - 2 ) = 5x 10-2m) Total electric potential at ( 30 cm , 0 0(m ) is Q 1 + 2 2 4 TTE ( 6X 10- 2 ) LTTE ( 2 X 10- 2 ) 120 X 10- 9 ( 2 X 109 ) 6X 10 - 2 2X 10 - 2 V G = - 1800 V ( Page2 )1 Q 25 5 cm (3.0 cm, 0.0cm ) 3 cm -7/