الفيزياء العامة الجزء الثاني#موقع الفيزياء.كوم

Lectures in General Physics
Example 4.8
Two large non-conducting sheets of +ve charge face each other as
shown in figure 4.20. What is E at points (i) to the left of the sheets (ii)
between them and (iii) to the right of
the sheets?
Solution
We know previously that for each sheet,
the magnitude of the field at any point
is
σ
E =
2ε ο
(a) At point to the left of the two
parallel sheets
E = -E 1 + (-E 2 ) = -2E
σ
∴ E = −
ε ο
Figure 4.20
(b) At point between the two sheets
E = E 1 + (-E 2 ) = zero
(c) At point to the right of the two parallel sheets
E = E 1 + E 2 = 2E
σ
∴ E =
ε ο
Dr. Hazem Falah Sakeek