Question

Diameter of a wire measured by a screw guage in four different readings is
found to be 2.20 mm, 2.10 mm, 2.40 mm and 1.90 mm. Options are :- a)No. of significant figures in all reading is 2 b)Error in first reading is negative. c) Mean error of reading is zero d) Error in fourth is 0.25 mm.​

Answer 1

Explanation:

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