Two parallel plates having equal and opposite charges a separated by a 2 cm thick slab of dielectric
constant 3. If the electric field between the plates is 10 V/m. Calculate the polarization (P) and
displacement (D) vector
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0
Answer:
3
Explanation:
When the space between the plates is evacuated, the electric field is E=
Aϵ
0
Q
where A be the area of plates.
When the space is filled with dielectric, the electric field is E=
AKϵ
0
Q
where K is the dielectric constant.
E
E
0
=
AKϵ
0
Q
Aϵ
0
Q
=K
∴K=
E
E
0
=
2.50×10
5
3.20×10
5
=1.28≈1.3=
10
13
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