Question
Which of the following SI prefixes has a multiplicative factor of 10−9 ?
This question was previously asked in
RRB NTPC 2025 Graduate CBT 2 Question Paper PDF (10-Jul-2026) (Shift 1)
The correct answer is
Nano
SI prefixes denote powers of ten used with units. Milli is 10−3, centi is 10−2 and micro is 10−6.
The prefix nano represents a multiplicative factor of 10−9, that is one billionth of the base unit.
Hence, the SI prefix with a factor of 10−9 is Nano.
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