# Calculating the voltage and electric field strength between two parallel plates

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 P: 157 1. The problem statement, all variables and given/known data - 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. 2. Relevant equations V= E*d F= Q*E V= Qd/ Aε(0) E= Q/ Aε(0) 3. 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 Are my calculations for the first part correct? And I really don't know how to approach the rest of the problem. Can someone please help me? Any hints?
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P: 41,320
 Quote by mmoadi 1. The problem statement, all variables and given/known data - 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. 2. Relevant equations V= E*d F= Q*E V= Qd/ Aε(0) E= Q/ Aε(0) 3. 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 Are my calculations for the first part correct? And I really don't know how to approach the rest of the problem. Can someone please help me? Any hints?
Yes, V = 0.01V is correct for the first part. The other equation that you will need is Q = CV. That should give you what you need for the rest.
 P: 157 Thank you for helping! Second part: What is the strength of electric field to the left and to the right of each plate? I need some help with this part. Any hints? 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!

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