Number of Electrons Removed to Acquire Charge – Rankers Physics

Properties of Charges: Practice Problem & Solution

The number of electrons that should be removed from a metal coin such that coin acquires a positive charge of \(10^{-10}\text{ C}\) is
\(1.6 \times 10^{-19}\)
\(6.25 \times 10^{9}\)
\(6.25 \times 10^{8}\)
\(1.6 \times 10^{8}\)

Solution Explained:

To solve this problem, we apply the core principles of Properties of Charges. Understanding the underlying formula is key to arriving at the correct answer below:

Using quantization of charge, \(q = ne ⇒ n = \frac{q}{e} = \frac{10^{-10}}{1.6 \times 10^{-19}} = 6.25 \times 10^8\).

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