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CBSE Class 12-science Answered

why does coloumb`s force act between two charges only  in the line joing their centres?
Asked by my3shyll | 10 Apr, 2018, 07:38: PM
answered-by-expert Expert Answer
This is due to the basic properties of electrical charge. Like charges repel each other. Opposite charges attract towards each other.
Force of attraction or repulsion from one charge to other charge will be directed along the direction so that minimum work will be done by the force. This requirment leads to the direction of action along the straight line joining the two charges which is the least distance between the charges.
Answered by Thiyagarajan K | 10 Apr, 2018, 10:33: PM

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CBSE 12-science - Physics
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CBSE 12-science - Physics
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CBSE 12-science - Physics
The number of moles in an elemental sample is just the ratio of the mass m to atomic mass 4. n= A The number of protons N, in an elemental sample is Z (atomic number) times the number of moles of Avogadro's number NA N=ZnN P A Copper has an atomic mass of 63.5 g/mole and 29 protons per atom. If such an atom were neutral, then it would have as many protons as electrons. If you remove electrons from a neutral state, then you get a net positive charge. Given a 54 gram ball of copper with a net charge of 2.2 µC, what fraction of the copper's electrons have been removed?
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ans the questions wit reason
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