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A billionth of a second is defined as a:
Answer & Solution
Correct Answer:
Option
C
Nanosecond : A nanosecond (ns) is an SI unit of time equal to one thousand-millionth of a second (or one billionth of a second), that is, $$\frac{1}{{1,000,000,000}}$$ of a second, or 10−9 seconds.
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