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mmoadi
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Homework Statement
- How much is the electrical voltage U between two evenly electrified parallel flat plates, distanced d = 1 cm, if the strength of electric field between them is E = 1 V / m?
- What is the strength of electric field to the left and to the right of each plate?
- What is the force on the surface (area) unit between the two plates?
- What are the voltage between the plates and the force on the surface unit as a result of doubling the distance between the two plates?
- How is the strength of the electric field and force between the two plates altered (changed), if the voltage is maintained constant?
Influencing constant is ε(0) = 8.85 × 10^-12 As / Vm.
Homework Equations
V= E*d
F= Q*E
V= Qd/ Aε(0)
E= Q/ Aε(0)
Q= CV
The Attempt at a Solution
First part: How much is the electrical voltage U between two evenly electrified parallel flat plates?
V= 1 V/m* 0.01 m= 0.01 V
Second part: What is the strength of electric field to the left and to the right of each plate?
E= V/ d
E= 0.01 v/ 0.01 m= 1 V/m
Third part: What is the force on the surface unit between the two plates?
E= ½ Q*V → Q= 2E/ V
Q= 200 C
F= Q*E= 200 N
Fourth part: What are the voltage between the plates and the force on the surface unit as a result of doubling the distance between the two plates?
d= 2 cm= 0.02 m
V= d*E= 0.02 V
Q= 2E/ V= 100 C
F= Q*E= 100 N
ARE MY CALCULATIONS CORRECT?
Fifth part: How is the strength of the electric field and force between the two plates altered (changed), if the voltage is maintained constant?
I need some help with this part. Any hints?
Thank you for helping!