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If a ruler has a least count of 0.1 cm, what is the maximum error in measurement

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Question: If a ruler has a least count of 0.1 cm, what is the maximum error in measurement? (2023)

Options:

  1. 0.05 cm
  2. 0.1 cm
  3. 0.2 cm
  4. 0.01 cm

Correct Answer: 0.1 cm

Exam Year: 2023

Solution: 

The maximum error is typically taken as the least count of the measuring instrument, which is 0.1 cm.

If a ruler has a least count of 0.1 cm, what is the maximum error in measurement

Practice Questions

Q1
If a ruler has a least count of 0.1 cm, what is the maximum error in measurement? (2023)
  1. 0.05 cm
  2. 0.1 cm
  3. 0.2 cm
  4. 0.01 cm

Questions & Step-by-Step Solutions

If a ruler has a least count of 0.1 cm, what is the maximum error in measurement? (2023)
  • Step 1: Understand what 'least count' means. It is the smallest value that can be measured by the ruler.
  • Step 2: Identify the least count given in the question, which is 0.1 cm.
  • Step 3: Know that the maximum error in measurement is usually equal to the least count of the measuring instrument.
  • Step 4: Conclude that the maximum error in measurement is therefore 0.1 cm.
  • Least Count – The smallest division or increment that can be measured accurately with a measuring instrument.
  • Maximum Error – The maximum possible deviation from the true value that can occur due to the limitations of the measuring instrument.
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