Chapter Exam

Unit 2: Units and Measurements — Online MCQ Test

Q: Which of the following is the SI base unit of length?

Answer: A. metre — The SI base unit of length is metre (m). The other options are multiples or submultiples of the metre.

Q: How many fundamental quantities are there in the SI system used in school physics?

Answer: C. 7 — The SI system has 7 fundamental quantities, such as length, mass, time, electric current, temperature, amount of substance, and luminous intensity.

Q: Which of the following is the correct SI unit of force?

Answer: A. kg m s^-2 — Force is defined by Newton's second law, so its SI unit is kg m s^-2, which is called newton.

Q: A meter scale has least count 1 mm. If the measured length is 25.4 cm, the number of significant figures in the measurement is:

Answer: C. 3 — The value 25.4 cm has three significant figures. The decimal part indicates precision up to one-tenth of a centimetre.

PHYSICS · CLASS 11 INTERMEDIATE 1 YEAR · Telangana State Board

Practice Unit 2: Units and Measurements with a free chapter-wise online MCQ test for Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR PHYSICS. This chapter covers: This chapter covers SI units fundamental and derived units measurement of length mass and time accuracy precision errors in measurement and dimensional analysis applications.. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Unit 2: Units and Measurements — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR PHYSICS — Unit 2: Units and Measurements, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is the SI base unit of length?

A. metre ✓
B. kilometre
C. centimetre
D. millimetre

Answer: A. metre
The SI base unit of length is metre (m). The other options are multiples or submultiples of the metre.

How many fundamental quantities are there in the SI system used in school physics?

A. 4
B. 5
C. 7 ✓
D. 10

Answer: C. 7
The SI system has 7 fundamental quantities, such as length, mass, time, electric current, temperature, amount of substance, and luminous intensity.

Which of the following is the correct SI unit of force?

A. kg m s^-2 ✓
B. kg m^2 s^-2
C. N m^-1
D. m s^-1

Answer: A. kg m s^-2
Force is defined by Newton's second law, so its SI unit is kg m s^-2, which is called newton.

A meter scale has least count 1 mm. If the measured length is 25.4 cm, the number of significant figures in the measurement is:

A. 1
B. 2
C. 3 ✓
D. 4

Answer: C. 3
The value 25.4 cm has three significant figures. The decimal part indicates precision up to one-tenth of a centimetre.

Which one of the following is NOT a valid use of dimensional analysis?

A. checking whether an equation is dimensionally homogeneous
B. deriving a relation among physical quantities up to a constant factor
C. finding the exact numerical value of a dimensionless constant like 2 or π ✓
D. converting units from one system to another

Answer: C. finding the exact numerical value of a dimensionless constant like 2 or π
Dimensional analysis cannot determine exact numerical constants such as 2 or π. It is useful for checking equations and converting units.