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Standard XII

Physics

Idea behind a PPC

Twelve charge...

Question

Twelve charges of charge $q$ are situated at the corners of the 12 sided polygon of side $a$ . What is net force on the charge $Q$ at the centre

Zero

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\frac{3 q Q}{π ϵ_{0} a^{2}}

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\frac{q Q}{π ϵ_{0} a^{2}}

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None of the above

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Solution

The correct option is A Zero
Due to symmetricitu of the polygon, the force on the centre due to opposite charges will cancel each other. Hence net force on the charge Q at the centre will be zero.
Hence option (A) is correct

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Twelve charges of charge q are situated at the corners of the 12 sided polygon of side a. What is net force on the charge Q at the centre

The correct option is A ZeroDue to symmetricitu of the polygon, the force on the centre due to opposite charges will cancel each other. Hence net force on the charge Q at the centre will be zero.Hence option (A) is correct

Twelve charges of charge $q$ are situated at the corners of the 12 sided polygon of side $a$ . What is net force on the charge $Q$ at the centre

The correct option is A Zero
Due to symmetricitu of the polygon, the force on the centre due to opposite charges will cancel each other. Hence net force on the charge Q at the centre will be zero.
Hence option (A) is correct