Electrostatics 5 Question 32

34. The magnitude of electric field E in the annular region of a charged cylindrical capacitor

(1996,2M)

(a) is same throughout.

(b) is higher near the outer cylinder than near the inner cylinder.

(c) varies as 1/r where r is the distance from the axis.

(d) varies as 1/r2 where r is the distance from the axis.

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Answer:

Correct Answer: 34. (c)

Solution:

  1. The magnitude of electric field at a distance r from the axis is given as :

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E=λ2πε0r i.e. E1r

Here, λ is the charge per unit length of the capacitor.



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