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

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 ?

A. Only (i)
B. Only (ii)
C. Only (iii)
D. Both (i) and (ii)

Absolute uncertainty in a measurement depends upon______________?

A. The magnitude of the measurement
B. Least count of the instrument
C. Percentage error in the measurement
D. All of a, b and c

Steradian is the SI unit of________________?

A. Plane angle
B. Solid angle
C. Both plane angle and solid angle
D. Neither plane angle nor solid angle

An ideal standard of measurement of a base quantity has characteristics_______________?

A. Accessible
B. Invariable
C. Transportable
D. Only a and b are correct

Total uncertainty, in the result obtained from the subtraction of two measurements, is equal to_______________?

A. Sum of their absolute uncertainties
B. The difference of their absolute uncertainties
C. The product of their absolute uncertainties
D. Division of their absolute uncertainties

Which one is the highest power multiple ?

A. Giga
B. Beta
C. Mega
D. Deca

One pico stands for_________________?

A. 10 raised to power -15
B. 10 raised to power -12
C. 10 raised to power -9
D. 10 raised to power -6

Unit of G is ______________?

A. Nm2kg2
B. Nm2kg
C. Nm2kg-2
D. None

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