NCERT Solutions for Class 11 Science Properties of matter 1
Important Board Questions
Dimension and Measurement
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Numerical And Long Questions
A physical quantity is measured as Q = (2.1 ± 0.5) units. Calculate the percentage error in (1) Q2 (2) 2Q.
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P = Q2
∆p/p= 2∆Q/Q = 2(0.5/2.1) = 1.0/2.1 = 0.476
∆p/p x 100% = 47.6% = 48%
R=2Q
∆R/R=∆Q/Q ⇒ 0.5/2.1 = 0.238
∆R/R x 100% = 24%