Electrostatics 3 Question 14
14. A point charge
(a) The electric flux passing through the curved surface of the hemisphere is
(b) The component of the electric field normal to the flat surface is constant over the surface
(c) Total flux through the curved and the flat surfaces is
(d) The circumference of the flat surface is an equipotential
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Answer:
Correct Answer: 14. (a,d)
Solution:
- (a)
(b) The component of the electric field perpendicular to the flat surface will decrease so we move away from the centre as the distance increases (magnitude of electric field decreases) as well as the angle between the normal and electric field will increase. Hence, the component of the electric field normal to the flat surface is not constant.
Alternate solution
As we move away from centre
(c) Total flux
So,
(d) Since, the circumference is equidistant from
