Electric Field and Force Calculations

AI Thread Summary
To calculate the electric field at point P due to two charges, determine the vector contributions from each charge and sum them. The force on a charge placed at point P can be found using the equation F = qE, where E is the electric field at that point. For the electric field above an infinite plane with charge density, use the formula E = σ/(2ε₀). The electric flux through a tilted flat plate above the infinite plane can be calculated using the area of the plate and the angle of inclination. Lastly, the electric field around an infinite wire with charge density λ is given by E = λ/(2πε₀R).
kmjones26
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I need help getting started on a few questions. If you could just provide the equation I should use then I would be very thankful.

1. A point charge of 2Q is a distance L from a point charge of -Q. What is the electric field at Point P a distance L abouve the center of the 2 charges. Picture below:
<...>P
<...>|
<...>|
2Q______L______-Q

2. What would the force be on a -Q charge placed at the point a distance L above the center of the charges in the problem above.

3. What is the electric field a distance of 0.5 meters above an infinite plain of charge density 25C/m^2

4. If the center of a flat plate wish a radius of 5cm is placed at an angle of π /3 radians, 1 meter above the infinite plain from the previous problem, then what would be the flux through the plate?

5. What would be the electric field a distance R away from an infinite wire with a charge density of λ
 
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Welcome to PF!

Hi kmjones26! Welcome to PF! :smile:

(try using the X2 tag just above the Reply box :wink:)

1. Electric field is a vector, so find the two vectors at P from the two charges, and add the components.

2. Force = charge times electric field (F = qE). :wink:

Show us what you get. :smile:​
 
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