.A positive test charge of mass m=1mg and charge +q is placed a distance y=4m above the center of a uniformly, positively charged circular hoop of radius a=3m, with a charge +Q=1µC. If the charge +q is in equilibrium at point y, find the value of the charge +q? (g=10m/s², k=9.0x10° N.m²/C²) Y• +q,m +Q
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