A sphere of insignificantly charged size is suspended from a wire
long l is insulated and then attached to a metal wire (infinitely long) charged together
sign with sphere. Determining the deflection angle of the rope knows the ball is ejected one by one
section 2cm. The weight of the sphere is 500g, the charge on the sphere is 0.5 ×10^6 C and the charge density the wire is 10^-8 C/cm
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