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State the value of (i) proportionality i...

State the value of (i) proportionality in Coulomb's law (ii) the permittivity of free space.

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(i) The value of the constant k in coulomb.s law `k = 9xx10^12Nm^2C^-2`
(ii) The permittivity of free space
`epsilon_0 = 1/(4pik) = 8.85 xx 10^-12C^2N^-1m^-2`
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Knowledge Check

  • The unit of permittivity of free space, epsilon_0 is

    A
    Coulumb² / (Newton − metre)²
    B
    Coulumb / Newton − metre
    C
    Newton − metre² / Coulumb²
    D
    Coulumb² / Newton − metre²

  • The value of constant 'K' in coulomb law is

    A
    `0.9xx10^(-9)Nm^(2)C^(2)`
    B
    `9xx10^(9)Nm^(2)C^(2)`
    C
    `9xx10^(9)Nm^(-2)C^(-2)`
    D
    `9xx10^(9)Nm^(2)C^(2)`

  • Value of k in Coulomb's law depends upon

    A
    magnitude of chrages
    B
    distnace between charges
    C
    both (a) and (b)
    D
    medium between two charges

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