Question

What is the value of 1 nanosecond in second?

• A. 10^-9
• B. 10^-6
• C. 10^-8
• D. 10^-10

Answer 1

The correct option is A

10^-9

The explanation for the correct answer:

1. An SI unit of time is nanosecond (ns) and it is equal to one billionth of a second.
2. The prefix nano and the unit second combine to make the term nanosecond.
3. $\mathrm{nanoseconds}=\mathrm{seconds}\times 1,000,000,000$
4. One second has a duration of 1,000,000,000 nanoseconds, which is why we used this number in the formula above.
5. Hence, it is correct answer.

A correct answer is option (A):10^-9