Physics — Class 11 — Chapter 1: Units and Measurements

Question 1+4 / −1

The dimensional formula of pressure is:

[M L^-1 T^-2] [M L T^-2] [M L^2 T^-2] [M L^-1 T^-1]

Question 2+4 / −1

Which of the following pairs has the same dimensions?

Work and Power Impulse and Momentum Force and Energy Pressure and Force

Question 3+4 / −1

The number of significant figures in 0.00340 is:

6 5 3 2

Question 4+4 / −1

A quantity is Z = A^2 B / sqrt(C). If the percentage errors in A, B and C are 1%, 2% and 4% respectively, the percentage error in Z is ___ %.

Question 5+4 / −1

The dimensional formula [M L^2 T^-2] represents:

Force Power Work / Energy Pressure

Question 6+4 / −1

Which of the following is a dimensionless quantity?

Strain Force Velocity Density

Question 7+4 / −1

The sum 24.36 + 0.0623 + 256.2, written to the correct number of decimal places, is ___ (give the numerical value).

Question 8+4 / −1

Which quantity–SI unit pair is NOT correctly matched?

Force – newton Energy – joule Power – watt Pressure – newton

Question 9+4 / −1

A light year is a unit of:

Time Distance Speed Light intensity

Question 10+4 / −1

A screw gauge has a pitch of 1 mm and 100 divisions on its circular scale. Its least count, in mm, is ___