Question

Statement I SI unit of charge is coulomb, denoted by $C$. One coulomb is the charge flowing through a wire in $1\, s$, if the current is $1\, A$.
Statement II$-1 C$ has $6 \times 10^{10}$ electrons.

• A. Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I.
• B. Both Statement I and Statement II are correct but Statement II is not the correct explanation of Statement I.
• C. Statement I is correct but Statement II is incorrect.
• D. Statement I is incorrect but Statement II is correct.

Answer 1

Answer: (C)

Current is the flow of charge per unit time, $I=\frac{q}{t}$
$\Rightarrow q=I t$
$\Rightarrow I=1, t=1$ gives $q=1$ unit
$-1$ Chas $\frac{1}{1.6 \times 10^{-19}}=6 \times 10^{18}$ electrons approximately.