The correct option is 6×1018 electrons
Explanation
The concept relies on the quantization of electric charge, which states that the total charge ($Q$) on a body is always an integral multiple of the elementary charge ($e$). This relationship is expressed by the formula $Q = ne$, where $n$ is the number of electrons and $e$ is the magnitude of charge on a single electron.
Calculation and Analysis:
- The magnitude of charge on a single electron is a physical constant, approximately $e = 1.6 \times 10^{-19} \text{ C}$.
- To determine the number of electrons ($n$) required to constitute a total charge of $Q = 1 \text{ Coulomb}$, the formula is rearranged as:
$n = \frac{Q}{e}$ - Substituting the values:
$n = \frac{1}{1.6 \times 10^{-19}}$ - Solving this yields:
$n = 0.625 \times 10^{19} = 6.25 \times 10^{18}$
Therefore, one coulomb of charge is equivalent to the charge contained in approximately $6 \times 10^{18}$ electrons.
Key Takeaway:
The coulomb is the SI unit of electric charge, and it represents a macroscopic amount of charge equivalent to approximately $6.25 \times 10^{18}$ elementary charges (electrons or protons).