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Q.

In Millikan's experiment, static electric charge on the oil drops has bein obtained by shining X-rays. If the static electric charge on the oil drop is - I.282x 10-18 C, the number of electrons present on the oil drop is.

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answer is 8.

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Detailed Solution

Charge on one particle =1.6022×10−19C  on N particles =−1.282×10−18C N=−1.282×10−18−1.6022×10−19=8
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