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What is the force between two small char...

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

Text Solution

Verified by Experts

We can use Coulomb.s law to find the force.
`F=1/(4piepsilon_0)(q_1q_2)/r^2=9xx10^9xx((2xx10^(-7))xx(3xx10^(-7)))/(0.3)^2`
`=6xx10^(-3)` N
Both the charges are of the same polarity , hence the force is repulsive.
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What is the force between two small charged spheres having charges of 2xx10^(-7) C and 3xx10^(-7) C placed 30 cm apart in air?

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

Knowledge Check

  • The force between two small charged spheres having charges of 1xx10^(-7)C and 2xx10^(-7)C placed 20 cm apart in air is

    A
    `4.5xx10^(-2)N`
    B
    `4.5xx10^(-3)N`
    C
    `5.4xx10^(-2)N`
    D
    `5.4xx10^(-3)N`

  • The potential at a point due to charge of 5xx10^(-7)C located 10 cm away is

    A
    `3.5xx10^(5)V`
    B
    `3.5xx10^(4)V`
    C
    `4.5xx10^(4)V`
    D
    `4.5xx10^(5)V`

  • 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
    ` 2 xx 10^(-7) C `
    B
    `3 xx 10^(-2) C`
    C
    `4 xx 10^(-2) C `
    D
    `1 xx 10^(-2) C `

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