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What is the force between two small char...

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

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`6xx10^(-3)` N (repulsive )
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Knowledge Check

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

    A
    a) `3xx10^(-2)`C
    B
    b) `4 xx10^(-2)` C
    C
    c) `1xx10^(-2)C`
    D
    d) `2 xx10^(-2)` C

  • Two metallic spheres of radii 1 cm and 3 cm are given charges of -1 xx 10^(-2)" C" and 5 xx 10^(-2)" C" respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is

    A
    `3 xx 10^(-2)`C
    B
    `4 xx 10^(-2)` C
    C
    `1 xx 10^(-2)`C
    D
    `2 xx 10^(-2)`C

  • Tow metallic sphers of radii 1 cm and 3 cm are given charges of - 1 xx 10^(-2) C and 5 xx 10^(-2) C respectively. If these are connected by a conducting wire , the final charge on the bigger sphere is ……….. ,

    A
    `3 xx 10^(-2)` C
    B
    `4 xx 10^(-2)C `
    C
    `1 xx 10^(-2)C`
    D
    `2 xx 10^(-2)C`

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    Two insulated charge copper sphere A and B have their centres separated by a distance of 50 cm. What is the force of electrostatic repulsion, if the charge on each is 6.5xx10^(-7)C and the radii of A and B are negligible compared to the distance of separation?

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    Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm. What is the mutual force of electrostatic repulsion if the charge on each is 6.5 xx 10^(-2)C? The radii of A and B are negligible compared to the distance of separation. b. What is the force of repulsion if each sphere is charged double the above amount and the distance between them is halved?

    Potentia energy of two equal negative point charges of magnitude 2 mu C placed 1 m apart in air is :

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