31. Three point charges are located on a circular arc as shown in Figure P23.31. (a) What is the total electric field at P, the center of the arc? (b) Find the elec- tric force that would be exerted on a -5.00-nC point charge placed at P. +3.00 nC + 4.00 cm -2.00 nC 30.0° P 30.0° 4.00 cm + +3.00 nC

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31. Three point charges are located on a circular arc as
shown in Figure P23.31. (a) What is the total electric
field at P, the center of the arc? (b) Find the elec-
tric force that would be exerted on a -5.00-nC point
charge placed at P.
+3.00 nC
+
4.00 cm
-2.00 nC
30.0°
P
30.0°
4.00 cm
+
+3.00 nC
Transcribed Image Text:31. Three point charges are located on a circular arc as shown in Figure P23.31. (a) What is the total electric field at P, the center of the arc? (b) Find the elec- tric force that would be exerted on a -5.00-nC point charge placed at P. +3.00 nC + 4.00 cm -2.00 nC 30.0° P 30.0° 4.00 cm + +3.00 nC
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