Discuss point charges and volume charge distributions. Under what conditions may a charge distribution be considered a point charge?
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Question 4
a. Discuss point charges and volume charge distributions. Under what conditions may a
charge distribution be considered a point charge? CR (7)
b.Show that the vector field A is conservative if A possess one of these two properties:
AP (6)
i) The line integral of the tangential component of A along a path extending from a
point P to Q is independent of the path.
ii) The line integral of the tangential component of A around any closed path is zero.
c. Compare the electric flux in a cubical surface of a side 10cm and spherical surface of
radius 10 cm, when a charge of 5µC is enclosed by them. AN(4)
d. How does the electric field enclosing a given charge vary when the area enclosed by
the charged is doubled. Assuming the electric flux is constant. EV
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