Worksheets › Class 11 › Units and Measurement
Class 11 Units and Measurement worksheet
CBSE Physics. SI units, significant figures, dimensions, errors and their propagation. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
The dimensional formula of work is:
- [M⁻¹L³T⁻²]
- [MLT⁻¹]
- [M⁰L⁰T⁰] (dimensionless)
- [ML²T⁻²]
Answer
(d) [ML²T⁻²]
- 2.
The number of significant figures in 0.83090 is:
- 4
- 6
- 5
- 7
Answer
(c) 5
leading zeros do not count; zeros between or after digits (after a decimal point) do
- 3.
20 m/s in km/h is:
- 72 km/h
- 200 km/h
- 10 km/h
- 90 km/h
Answer
(a) 72 km/h
× 18/5
Section B · short answer
- 4.
Convert (a) 180 km/h into m/s, (b) a density of 6.2 g/cm³ into kg/m³.
Answer
(a) 50 m/s; (b) 6,200 kg/m³
1 km/h = 5/18 m/s; 1 g/cm³ = 1000 kg/m³
- 5.
State the number of significant figures in 18.1, 37317, 9648.
Answer
18.1: 3; 37317: 5; 9648: 4
Section C · long answer
- 6.
Use the method of dimensions to find how the period T of a simple pendulum depends on its length l and on g.
Answer
T = k√(l/g), where k is a dimensionless constant (it cannot be found by dimensions)
write the quantity as a product of powers and equate the powers of M, L and T
Fresh sheets for your child
In the app, every Units and Measurement sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
Coming soon for Android and iPhone.