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What is the force between two small cha...

What is the force between two small charged speres having charges of `2xx10^(-7)` c and `3xx10^(-7)` c placed 30 cm apart in air

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`6xx10^(-3)` N (repulsive )
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Two insulated metal spheres of the same size are charged with -15 esu and +25 esu. The distance between their centres is 10 cm. What is the force acting between the two charges? If the two spheres are made to touch each other and then placed in their previous positions, what will be the force acting between them?

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Knowledge Check

  • Two metallic spheres of radii 1cm and 3 cm are given charges of -1xx10^-2C and 5xx10^-2C . Respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is

    A
    `2xx10^(_2)C`
    B
    `3xx10^(_2)C`
    C
    `4xx10^(_2)C`
    D
    `1xx10^(_2)C`

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