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A student measures the length of a rod as 15.3 cm. If the true length is 15 cm,

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Question: A student measures the length of a rod as 15.3 cm. If the true length is 15 cm, what is the error in measurement?

Options:

  1. 0.3 cm
  2. 0.2 cm
  3. 0.1 cm
  4. 0.5 cm

Correct Answer: 0.3 cm

Solution: 

Error in measurement = Measured value - True value = 15.3 - 15 = 0.3 cm.

A student measures the length of a rod as 15.3 cm. If the true length is 15 cm,

Practice Questions

Q1
A student measures the length of a rod as 15.3 cm. If the true length is 15 cm, what is the error in measurement?
  1. 0.3 cm
  2. 0.2 cm
  3. 0.1 cm
  4. 0.5 cm

Questions & Step-by-Step Solutions

A student measures the length of a rod as 15.3 cm. If the true length is 15 cm, what is the error in measurement?
  • Step 1: Identify the measured value. In this case, the measured value is 15.3 cm.
  • Step 2: Identify the true value. Here, the true value is 15 cm.
  • Step 3: Subtract the true value from the measured value to find the error. So, calculate 15.3 cm - 15 cm.
  • Step 4: Perform the subtraction. 15.3 - 15 equals 0.3.
  • Step 5: State the error in measurement. The error is 0.3 cm.
  • Measurement Error – Understanding the difference between the measured value and the true value to calculate error.
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