Question

Which of the following charge is not possible?

• A. $1.6 \times 10^{-19} C$
• B. $4.8 \times 10^{-19} C$
• C. $8 \times 10^{-19} C$
• D. $6 \times 10^{-19} C$

Answer 1

Answer: (D)

According to quantization of charge, any charge will be an integer multiple of a smallest charge (e) $Q=\pm n e$
where $n=1,2,3 \ldots$ and $e=1.6 \times 10^{-19} C$
In the given charges only $6 \times 10^{-19} C$ is not an integer multiple of $e$.
Therefore, this charge is not possible.