Grade 12Algebra

The figure in the attachment is an mcq of Gauss law. Please give the answer with explanation.

Question image for The figure in the attachment is an mcq of Gauss la

khushbu

9 Years agoGrade 12

1 Answer

Vaibhav Singh

Approved Tutor Answer9 Years ago

Flux is given by E.A =EA $\cos \theta$ $\hat{}$ $\hat{n}$ where $\hat{n}$ points isarea vector pointing away from surface.In this question at point A whic is a diametric point, at surface near A electricfflus is -EA as $\hat{n}$ is in opposite direction to E and at farther surface it is EA. Therefore total flux due to A is 0. Similar is the case with point C. But at point B and D there is only one surface to allow electric field to pass through. Therefore due to B and D flux is -EA (non zero). Hence, flux remains unchanged due to A and C only.