The numbers 2.745 and 2.735 on rounding off to 3 significant figures will give
2.75 and 2.74
2.74 and 2.73
2.75 and 2.73
2.74 and 2.74
The length and breadth of a rectangular sheet are 16.2 cm and 10.1 cm, respectively. The area of the sheet in appropriate significant figures and error is
164 ± 3 cm2
163.62 ± 2.6 cm2
163.6 ± 2.6 cm2
163.62 ± 3 cm2
Which of the following pairs of physical quantities does not have same dimensional formula?
Work and torque
Angular momentum and Planck's constant
Tension and surface tension
Impulse and linear momentum
Measure of two quantities along with the precision of respective measuring instrument is
A = 2.5ms-1 ± 0.5 ms-1 B = 0.10 s ± 0.01 s. The value of AB will be
(0.25 ± 0.08) m
(0.25 ± 0.5) m
(0.25 ± 0.05) m
(0.25 ± 0.135) m
You measure two quantities as A = 1.0 m ± 0.2 m, B = 2.0 m ± 0.2 m. We should report correct value for $\sqrt{AB}$ as
1.41 ± 0.4 m
1.41 m ± 0.15 m
1.4 m ± 0.3 m
1.4 m ± 0.2 m