Question
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Solving time: 2 mins
A point charge is kept at the origin of a co-ordinate system. Another charge is kept at a point having co-ordinates . Find force on due to .
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Text solutionVerified
. In this equation is nothing but distance between the two charges.
You must be careful in writing . It is a unit vector from source towards the test charge .
Put and with sign in the above equation.
In Short
(i) Coulomb's law gives force between two point charges. We can use it directly to get force between two small charged bodies kept at large separation.
(ii) Magnitude of force between two charges is
where for vacuum and air. For all other
(iii) and
(iv) Force due to source charge on a test charge can be written in vector form as
where is distance between the two charges and is a unit vector directed from the source charge to the test charge. While using this equation we must put and with their respective signs.
(v) Electrostatic force is far stronger than the gravitational force.
(vi) 1 coulomb is a large charge.
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Question Text | A point charge is kept at the origin of a co-ordinate system. Another charge is kept at a point having co-ordinates . Find force on due to . |
Topic | Electric Charges and Fields |
Subject | Physics |
Class | Class 12 |
Answer Type | Text solution:1 |
Upvotes | 102 |