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electrostatics

electrostatics

by lokesh sardana -
Number of replies: 1

Cahrges Q1 and Q2 lies inside and outside resp. of a closed surface S.Let E be the field at any point on S and @ be the flux of E over S,then which are correct options

(A) If Q1 changes,both E & @ changes

(B) If Q2 changes, E will change but @ will not change

(C) If Q1=0 and Q2 not=0 then E not=0 but @=0

(D) If Q1=not0 and Q2=0 then E =0 but @ not=0

In reply to lokesh sardana

Re: electrostatics

by Astitwa Lathe -

 I think Option (A),(B),(C) are right. For (A) (B) (C) \( \int_{}^{}E.\,ds\) Enet is used in the equation but only the contribution of internal charge electric field gets counted in obtaining flux.So no effect on flux when Q2 changes.Also , when Q1 =0 @ is zero according to gauss law. Enet however depends on both Q1 and Q2. Hence the answer