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An oil drop has 6.39 xx 10^(-19)C charg...

An oil drop has `6.39 xx 10^(-19)C` charge .How many electrons does this oil drop has ?

A

2

B

4

C

8

D

16

Text Solution

Verified by Experts

The correct Answer is:
B
q = ne
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Knowledge Check

  • In a Millikan's oil drop experiment the charge on an oil drop is calculated to be 16.35 xx 10^(-19) C . The number of excess electrons on the drop is

    A
    `3.9`
    B
    `4`
    C
    `4.2`
    D
    `6`

  • In Millikan's experiment, static electric charge on the oil droplets two obtained by shining X rays. If the static electric charges on an oil drople is -1.282xx10^(-18)C , the number of electrons captured by the droplet is

    A
    `8`
    B
    `6`
    C
    `7`
    D
    `5`

  • Assertion (A): A conductor has + 3.2 xx 10^(-19) C charge. Reason (R): Conductor has gained 2 electrons.

    A
    Both A and R are true and R is the correct explanation of A.
    B
    Both A and R are true but R is NOT the correct explanation of A
    C
    A is true but R is false.
    D
    A is false and R is true.

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    An oil drop 'B' has charge 1.6 xx 10^(-19)C and " mass " 1.6 xx 10^(-14)kg . If the drop is in equilibrium position, then what will be potential difference between the plates. [The distance between the plates is 100mm]

    In Millikan's oil drop experiment, a charged oil drop of mass 3.2xx10^(-14)kg is held stationary between two parallel plates 6mm apart by applying a potential difference of 1200 V between them. How many excess electrons does the oil drop carry? Take g =10ms^(-2)

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