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Questions and Answers
What is the process of converting units from MKS (SI) to CGS called?
What is the process of converting units from MKS (SI) to CGS called?
Which instrument would be most suitable for measuring small lengths with high precision?
Which instrument would be most suitable for measuring small lengths with high precision?
What is the term for the difference between a measured value and the true value of a quantity?
What is the term for the difference between a measured value and the true value of a quantity?
What is the correct term for the process of converting units from CGS to MKS (SI)?
What is the correct term for the process of converting units from CGS to MKS (SI)?
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When using a Vernier caliper, what is the term for the smallest fraction of the main scale that can be measured?
When using a Vernier caliper, what is the term for the smallest fraction of the main scale that can be measured?
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If a quantity is measured to be $5.2 ext{ kg}$ and the true value is $5 ext{ kg}$, what is the percentage error in the measurement?
If a quantity is measured to be $5.2 ext{ kg}$ and the true value is $5 ext{ kg}$, what is the percentage error in the measurement?
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Study Notes
Unit Conversion Processes
- Converting units from MKS (Meter-Kilogram-Second) to CGS (Centimeter-Gram-Second) is known as unit conversion or unit transformation.
- The reverse process, converting from CGS to MKS, is also referred to as unit conversion.
Precision Measurement Instruments
- A laser interferometer is most suitable for measuring small lengths with high precision due to its ability to detect minute changes in distance through the interference of light waves.
Measurement Error Terminology
- The difference between a measured value and the true value of a quantity is termed measurement error.
Vernier Caliper Measurement
- The smallest fraction of the main scale that can be measured using a Vernier caliper is called the Vernier scale reading or least count.
Percentage Error Calculation
- If a quantity is measured as 5.2 kg with a true value of 5 kg, the percentage error is calculated as:
- Percentage error = (\frac{|Measured - True|}{True} \times 100)
- In this case, it would be (\frac{|5.2 - 5|}{5} \times 100 = 4%) error.
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Description
Test your knowledge on physical quantities, units interconversion (MKS to CGS and vice versa), error estimation, measurement with Vernier caliper, and micrometer screw gauge.
