870 q3 q1 r0505 r05187237 rr1 qq r11 13237 7 a

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When Q1 was changed to 3_c, the null was located at (-1.87,0).  Q=3 q=1 R=0.5+0.5 r=0.5+1.87=2.37 r=R/1- (-q/Q)  r=1/1- (1/3)=2.37 7. A configuration was made using Q1,Q2, Q3 located at the points: (-1,0),(1,0), (0,1.732). The null points for this triangle were located at the following points: (- 2.85x10 -1 , 7.415x10 -1 ), (2.85x10 -1 , 7.418x10 -1 ), (1.14x10 -4 , 2.485x10 -1 ), (-1.14x10 -4 5.773x10 -1 ). One of the null points was located in the middle of the triangle. The  charge at (0,1.732) was then moved to (0,2.5). The null points found for that  triangle were: (-1.14x10 -4 , 8.688x10 -2 ) and (-5.0x10 -5 , 1.228). The same charge was
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then moved to (0, 3.5). The null points for that triangle were: (-6.35x10 -5 , 1.891)  and (-3.18x10 -5 , 4.178x10 -2 ).  8. Below is a charge distribution of four charges where the electric potential is zero  at the same point where the electric field is zero.  9. Below is a charge distribution of four charges where the electric potential is not  zero at the point where the electric field nulls.  10. Below is a charge distribution using five charges where the electric field nulls.  11. Below is a charge distribution using six charges where the electric field nulls. 
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  • Fall '13
  • Nickas
  • Physics, 3cm, 1.5cm, Kathleen Brinegar, Elyse WeddlePhysics Lab, Kelsey Wagner

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