The three small sphere as shown in fig. carry charges q1=4nC,q2=−7.8nC and q3=2.4nC. Find out the magnitude of the net electric flux in Nm2/Cthrough S3surface shown in cross section in the figure.
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Solution
Flux through closed surface S3,ϕS3=Qinϵ0=q1+q2ϵ0=((4.00−7.8)×10−9C)/ϵ0=−429Nm2/C