1. A constant electric field is 29,000N/C is created between two parallel plates

Question

1. A constant electric field is 29,000N/C is created between two parallel plates. If the potential difference is 140,000V, how far apart are the two plates? Problems 2 and 3 refer to the following diagram +0 2. Three point charges are arranged in a square as in the diagram above.Find an expression for the electric potential at point A. Assume that V-0 at infinity . How much work is required to create this assembly of charges? An electric field of 10N/C is desired between two parallel plates a distance of 6om apart. a) What should the potential difference be? b) How much energy would a proton gain by going from the positive plate to the negative plate? c) What would it's speed be? 5. An electric field greater than 3 x 10 N/C will break down air and cause it to ionize. If two parallel plates have a potential difference of 165V between them, how close together can they get before the air ionizes? 6. (20 pts.) An atom is made of positively charged protons and neutral neutrons concentrated in a nucleus, while negatively charged electrons orbit around them. If I want to make a Helium atonm out of two Hydrogen atoms, I am going to have to have to get 2 Hydrogen atoms very close together so that they can form a new nucleus. This is a process called nuclear fusion, and it takes a lot of energy a) If, in order for this to happen, I have to bring the two protons to within 10-15 m. How much energy does it take to bring this second proton from very far away to 10-15 m from the first b) With how much speed would I have to shoot this proton toward the first in order for it to make it? c) Is that speed faster than or slower than the speed of light? 7. What is the potential difference between points A and B? 72 cm More problems on the other side!!

Explanation / Answer

Please post other questions seperately. I am answering the first one.

We know that the electric field and potential are related by the following relation

V = E * d

Here V = 140000 V and E = 29000 N/C

Hence

d = 140000/29000 = 4.83 m

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