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JEE Main 2010 (AIEEE) · Significant Figures & Order of Magnitude

Significant Figures & Order of Magnitude question from JEE Main 2010 (AIEEE)

Q13JEE Main 2010 · AIEEEEasy

Significant Figures & Order of Magnitude

The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1 ×\times 10–3 are

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Answer: (a)

  1. 23.023: all digits significant, 5.
  2. 0.0003: leading zeros are not significant, 1.
  3. 2.1×10−32.1 \times 10^{-3}: power of ten is not counted, 2.
  4. So the answer is (a) 5, 1, 2.
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