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Class 11 Physics — Chapter 2: Units and Measurements
68 practice questions · 23 Easy · 23 Medium · 22 Hard
Free NCERT-aligned multiple-choice practice for Class 11 Physics, Chapter 2 (Units and Measurements). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 68.
Sample questions
Q1Easy
The SI unit of force is:
A.Dyne
B.Newton✓ correct
C.Joule
D.Pascal
Why
1 Newton = 1 kg·m·s⁻².
Q2Medium
The dimensional formula of pressure is:
A.[M L T⁻²]
B.[M L⁻¹ T⁻²]✓ correct
C.[M L² T⁻²]
D.[M L⁻² T⁻²]
Why
Pressure = Force/Area = [M L T⁻²]/[L²] = [M L⁻¹ T⁻²].
Q3Hard
If the percentage error in measuring the radius of a sphere is 2%, the percentage error in its volume is:
A.2%
B.4%
C.6%✓ correct
D.8%
Why
V = (4/3)πr³ ⇒ ΔV/V = 3 × (Δr/r) = 3 × 2% = 6%.
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