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The electric flux depends on charge, when the charge is zero the flux is zero. The electric field depends also on the charge. Thus when the electric flux is zero , the electric field is also zero for the same reason, zero charge.
Phi= integral E.dA= integral zcDdA = zcQ
Phi is zcQ and depends on charge Q, as does E.
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A Gaussian surface does not enclose a charge Does it mean that E equals 0 on its surface?
No.there can be electric field on the Gaussian surface even if the charge enclosed by it is zero.However ,net flux will be zero through the surface.
Where on the axis other than at an infinite distance is there a point at which their net electic field is zero between the charges to their left or to their right explain?
When the two charges are of same polarity then field becomes zero on its axial line but in between the two charges. If they are of opposite polarity then at points outside not in between there will be one point where the net electric field becomes zero. That point will be nearer to the weaker charge ie closer to the weaker and far from the stronger one.
1 A Gaussian surface in the shape of a right circular cylinder with end caps has a radius of 12.0cm and a length of 80.0cm Through one end there is an inward magnetic flux of 25.0µWb At the other e?
Using the Gauss' Law of Magnetism We know total flux will be zero flux(top)+flux(bottom)+flux(curved side)=0 ------- (a) flux(bottom)= -25e-3 (GIVEN) (-ve shows inward direction) flux(top)=B*A=(1.6e-3)*[3.14*(0.12)^2]=2.304e-5 Put the values in eq (a) you'll get flux(curved side)= +24.97e-3 (+ve shows direction is outward)
What is an electric charge less than zero?
Compound
What is the value of gravitational field at infinity?
zero
