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

Explanation

To find the number of electrons in an oil drop with a given charge, we can follow these steps:

### Step 1: Identify the given charge
The charge of the oil drop is given as:
\[ q = 6.39 \times 10^{-19} \, \text{C} \]

### Step 2: Know the charge of a single electron
The charge of a single electron is:
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