Three students measured the length of a needle with meter rod and recorded as : (i) 0.2145m (ii) 0.21m (iii) 0.214m Which one is a correct record ?

Related Mcqs:

Random errors can be reduced by_______________?

A. Taking zero correction B. Comparing the instrument with another more accurate one C. Taking mean of several measurements D. All methods explained in A, B and C...

Dimensional analysis is helpful for__________________?

A. Deriving a possible formula B. Checking the homogeneity of a physical equation C. Verification of laws D. Only A and B are correct...

SI unit of the coefficient of viscosity is___________________?

A. Kg.m.S-1 B. Kg m-1.S-1 C. Kg.m.S D. Kg-1.m-1.S-1...

The number of significant figures in the length of a bar 6200mm measured by meter rod is_______________?

A. 4 B. 3 C. 2 D. None of these...

The number 76.85 is rounded off up to two significant figures as_____________?

A. 76.8 B. 77 C. 76.9 D. None of these...