A conducting sphere of radius 10 cm has an unknown charge. If the electric field 20 cm from the centre of the sphere is 1.5 × 103 N/C and points radially inward, what is the net charge on the sphere?
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the net chargecwill be 3× 10^-17
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E=q/4π∈or²
q=E4π∈or²
q= 1.5*10^3 × (0.2)²÷9×10^9
q = 6.66nC
since it is radially inwards
q = -6.66nC
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