Figure 10(a) shows two charges q1 and q2 held a fixed distance d apart. (a) Find the strength of the electric force that acts on q1. Assume that q1 =q2 =21.3×10^-6C and d =1.52m. (b) A third charge q3=21.3×10^-6C is brought in and placed as shown in figure 10(b). Find the strength of the electric force that acts on q1 now.

Figure 10(a) shows two charges q1 and q2 held a fixed distance d apart

1.	Figure 10(a) shows two charges q1 and q2 held a fixed distance d apart. (a) Find the strength of the electric force that acts on q1. Assume that q1 =q2 =21.3×10^-6C and d =1.52m. (b) A third charge q3=21.3×10^-6C is brought in and placed as shown in figure 10(b). Find the strength of the electric force that acts on q1 now.
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