Units and Measurements
Q1. Choose the correct option. (4M)
i) The error in the measurement of the
sides of a rectangle is 1%. The error in
the measurement of its area is
(A) 1% (B) 1/2%
(C) 2% (D) None of the above.
ii) Light year is a unit of
(A) Time (B) Mass
(C) Distance (D) Luminosity
iii) Dimensions of kinetic energy are the
same as that of
(A) Force (B) Acceleration
(C) Work (D) Pressure
iv) Which of the following is not a
fundamental unit?
(A) cm (B) kg
(C) centigrade (D) volt
Q2 The radius of a sphere measured repeatedly yields values 5.63 m, 5.54m, 5.44 m, 5.40 m and 5.35 m. Determine the most probable value of radius and the mean absolute, relative and percentage errors. (3M)
Q3 The masses of two bodies are measured to be 15.7 + 0.2 kg and 27.3 + 0.3 kg. What is the total mass of the two and the error in it? (3M)
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