Units and Measurement Quiz - CBSE Class 11 Science

Free practice quiz: Units and Measurement (CBSE Class 11 Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 11 Science practice quiz has 20 multiple-choice questions on Units and Measurement, and 20 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following is a fundamental unit?

   1. Newton
   2. Joule
   3. Meter
   4. Watt
   Show answer

   Answer: C. Meter

   Meter is a fundamental unit of length in the SI system.

2. How many millimeters are there in 1 kilometer?

   1. 1000 mm
   2. 1,000,000 mm
   3. 100 mm
   4. 10,000 mm
   Show answer

   Answer: B. 1,000,000 mm

   1 km = 1000 m, 1 m = 1000 mm, therefore 1 km = 1,000,000 mm

3. How many significant figures are there in 0.00250?

   1. 2
   2. 3
   3. 5
   4. 1
   Show answer

   Answer: B. 3

   Leading zeros are not significant, but trailing zeros after the decimal point are. Therefore, there are three significant figures.

4. If the length and breadth of a rectangle are measured as 2.5 cm and 3.2 cm respectively, what is the area with correct significant figures?

   1. 8.0 cm²
   2. 8 cm²
   3. 8.00 cm²
   4. 7.99 cm²
   Show answer

   Answer: B. 8 cm²

   Area = length × breadth = 2.5 cm × 3.2 cm = 8.0 cm². Since both measurements have only two significant figures, the answer should also have only two significant figures.

5. What are the methods to minimize systematic errors?

   1. Calibration of instruments, proper experimental design, using multiple techniques
   2. Ignoring them
   3. Repeating measurements many times
   4. Using only one measuring instrument
   Show answer

   Answer: A. Calibration of instruments, proper experimental design, using multiple techniques

   Minimizing systematic errors requires careful experimental design, calibration of equipment, and using multiple methods to cross-check results.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What is the SI unit of mass?
2. Convert 100 centimeters to meters.
3. What is the SI unit of time?
4. Express 5000 grams in kilograms.
5. What is the difference between accuracy and precision?
6. What are significant figures?
7. What is dimensional analysis used for?
8. What is the dimensional formula of force?
9. What is the dimensional formula for energy?
10. Explain the concept of error propagation in measurements.
11. A physical quantity P is related to four observables a, b, c and d as P = a³b²/cd. The percentage errors of measurement in a, b, c and d are 1%, 3%, 4% and 2% respectively. What is the percentage error in the quantity P?
12. Differentiate between systematic errors and random errors.
13. Explain the principle of homogeneity of dimensions.
14. A student measures the diameter of a sphere using a vernier caliper. The readings are 2.50 cm, 2.52 cm, and 2.48 cm. Calculate the mean diameter and the mean absolute error.
15. Discuss the limitations of dimensional analysis.

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