
Concept explainers
(a) Find the electric intensity on the z- axis produced by a cone surface that carries charge density

(a)
The electric field intensity on the z-axis produced by a cone surface that carries a charge density in free space.
Answer to Problem 2.26P
The electric field intensity is
Explanation of Solution
Given information:
Concept used:
Calculation:
Although
Plugging value of
The differential field contribution to a point in the x - y plane is now summed by integrating the preceding differential field over a finite surface.
Since only the

(b)
The total charge on the cone.
Answer to Problem 2.26P
The total charge on cone is
Explanation of Solution
Given information:
Concept used:
Calculation:
Hence
Therefore, using the above formula

(c)
The electric field intensity on the z-axis produced by a cone flattered disc, when
Answer to Problem 2.26P
Explanation of Solution
Given information:
Concept used:
The electric field for a surface charge is given by
the field is entirely in the vertical direction. The vertical component of the electric field is extracted by multiplying by θ, so
Calculation:
Although
Plugging all values in the above formula
The electric field is similar, as calculated in the problem 2.23

(d)
The electric field intensity on the z-axis, when
Answer to Problem 2.26P
The electric field intensity for part a when
Explanation of Solution
Given information:
Calculation:
The development of the electric field due to the given formula as follows

(e)
To proof:
Part a become an inverse z dependent E field when
Explanation of Solution
Given information:
Calculation:
In general, the electric field expressed as
Hence as z reduces electric field is increasing
So in this case field, E is inverse z dependent.
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Chapter 2 Solutions
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