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A polythene piece rubbed with wool is fo...

A polythene piece rubbed with wool is found to have negative charge of `3 xx 10^-7 C`. Estimate the number of electrons transferred.

Text Solution

Verified by Experts

The correct Answer is:
`1.875 xx 10^12`
As `Q = "ne", n = (Q)/( e)= (3 xx 10^-7 C)/(1.6 xx 10^-19 C) = 1.875 xx 10^12`.
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Knowledge Check

  • A polythene piece rubbed with wool is found to have negative charge of 3.6xx10^(-7)C . Calculate the number of electrons transferred from wool to polythene. If an electron has a mass 9.1 xx 10^(-31) kg , find the mass transferred to polythene.

    A
    `2.25xx10^(10) kg`
    B
    `6.25xx10^(-18) kg`
    C
    `2.05xx10^(-18) kg`
    D
    `4.15xx10^(-18) kg`

  • A polythene piece rubbed with wool is found to have a negative charge of 6xx10^(-7)C . The number of electrons transferred to polythene from wool is

    A
    `3.75xx10^(10)`
    B
    `9.6xx10^(10)`
    C
    `9.6xx10^(12)`
    D
    `3.75xx10^(12)`

  • A polythene piece rubbed with wool is found to have a negative change of 6.4 xx 10^(-19)C . How many electrons have been transferred during the process?

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    `4 xx 10^(12)`
    B
    `4 xx 10^(11)`
    C
    `4 `
    D
    None of these

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