Question

Assersion : Out of three meansurements `l = 0.7 m, l = 0.70m` and `l = 0.700m` the last one is most accurate.
Reason: In every meansurements only the last significant digit is not accurately known.
A. Statement -1 is true, Statement -2 is true , and Statement -2 is correct explanation of Statement -1.
B. Statement -1 is true , Statement -2 is true, but Statement -2 is not a correct explanation of Statement -1.
C. Statement-1 is true, but Statement -2 is false.
D. Statement-1 is false, but Statement -2 is true.

Answer 1

Correct Answer - (a)
Fractional error in the three measurements respectively are `+- (0.1)/(0.7), +- (0.01)/(0.70) , +- (0.001)/(0.700)`
The last one has the least error, i.e., it is most accurate. Choice (a) is correct.