In Millikan's experiment, static electric charge on the medias has been obtained by shining X-rays. if the static electric charge on the oil drop is `-1.282 xx 10^(-18)C`. Calculate the number of electrons present in it.

Explanation

To solve the problem of calculating the number of electrons present in an oil drop with a static electric charge of \(-1.282 \times 10^{-18} \, \text{C}\), we will follow these steps:

### Step 1: Understand the relationship between charge and number of electrons
The total charge \(q\) on the oil drop can be expressed in terms of the number of electrons \(n\) and the charge of a single electron \(e\) using the formula:
\[ q = n \cdot e \]
where:
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