What is the electric field at point P?

AI Thread Summary
To find the electric field at point P, the contributions from both the +2.80 μC and -8.50 μC charges must be calculated using the formula e = kq/r^2. The electric field from the positive charge points away from it, while the field from the negative charge points towards it. Since point P is closer to the positive charge, its electric field will have a greater magnitude. The total electric field at point P is the vector sum of the fields from both charges. It is crucial to consider the direction of each electric field when adding them together.
Mr.somebody
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Homework Statement



Point P is collinear with a +2.80 μC charged particle and a -8.50 μC charged particle as shown in the diagram below. Point P is 10 cm to the left of the positive charge and 20 cm to the left of the negative charge. What is the electric field at point P?

p--------(2.80uc)---------(-8.50uc)

Homework Equations


e=kq/r^2

The Attempt at a Solution


i found the e field from p to the positive charge and p to the negative charge should i add them to find the total e field at point p?
 
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Yes you just need to add the field due to the two charges; but remember that the E field is a vector!
 

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