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  • In Milikan’s experiment, static electric charge on the oil drops has been obtained by shining X-rays. If the static electric charge on the oil drop is minus 1.282 times 10 to the power minus 18 C, calculate the number of electrons present on it.

2.39    In Milikan’s experiment, static electric charge on the oil drops has been obtained by shining X-rays. If the static electric charge on the oil drop is -1.282 \times 10^{-18} \ \textup{C}, calculate the number of electrons present on it.

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Given charge on the oil drop is -1.282\times10^{-18}C

and the charge carried by one electron is -1.6022\times10^{-19} C

Therefore, the number of electrons present on the oil drop carrying -1.282\times10^{-18}C charge is:

= \frac{-1.282\times10^{-18}C}{-1.6022\times10^{-19}C}

= 0.8001\times10 = 8.0

 

Posted by

Divya Prakash Singh

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