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A cylindrical conductor has uniform cross-section. Resistivity of its material increases linearly from left end to right end. If a constant current is flowing through it and at a section distance  from left end, magnitude of electric field intensity is  which of the following graphs is correct

a)b)c)d)



Question ID - 151473 | SaraNextGen Top Answer

A cylindrical conductor has uniform cross-section. Resistivity of its material increases linearly from left end to right end. If a constant current is flowing through it and at a section distance  from left end, magnitude of electric field intensity is  which of the following graphs is correct

a)b)c)d)

1 Answer
127 votes
Answer Key / Explanation : (b) -

(b)

Let resistivity at a distance  from left end be  Then electric field intensity at a distance  from left and will be equal to

Where  is the current flowing through the conductor. It means  or  varies linearly with distance  But at  has non-zero value. Hence  is correct

127 votes


127