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Problem 4 (25pts). Consider a dipole configuration set up along a z axis as pictured in the Figure below. Q1 has a value of -e while while Q2 has a value of +e (a) What is the electric potential at a point P? b) What is the electric potential at a point P2? 25 A 02 1.27 A o P2 25 A 01 Remember that 1 Á is 1 × 10-10 m.

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Given data The charges are g--e =-1.6 × 10-19 c,g-e-l.6x 10-19 C Convert angstrom to meter 25A°-2.5x10-9 m 1.27A = 1.27×10-10 m The electric potential at pl is Ю. (1.27+25)1010 25x1010 ( ) ( ) 98109)(-1.6x10-19 98109)(1.6x10-19 (1.27+25)100 (25x10-10 0.028 V The distance is d=J(25),(127) 2 25.0 1.4 25.01×10-10 m The electric potential at p2 is ( 98109)(-1.6x10-19 10% )(1.6x10-19) ) (2.01-1025.01-10)

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