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Practice each question, then open the answer or worked solution.
The number of significant figures in 0.06900 is:
a) 5
b) 4
c) 2
d) 3
The correct answer is b) 4
The number of zeroes on the left of the non-zero number is not considered as significant figures but the zeroes that are on the right of the non-zero number are significant figures.
The sun of the numbers 436.32, 227.2, and 0.301 inappropriate significant figures is:
a) 663.821
b) 664
c) 663.8
d) 663.82
The correct answer is c) 663.8
The mass and volume of a body are 4.237 g and 2.5 cm3, respectively. The density of the material of the body in correct significant figures is:
The correct answer is c) 1.7 g/cm3
The numbers 2.745 and 2.735 on rounding off to 3 significant figures will give:
a) 2.75 and 2.74
b) 2.74 and 2.73
c) 2.75 and 2.73
d) 2.74 and 2.74
The correct answer is d) 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 inappropriate significant figures and error is:
a) 164 ± 3 cm2
b) 163.62 ± 2.6 cm2
c) 163.6 ± 2.6 cm2
d) 163.62 ± 3 cm2
The correct answer is a) 164 ± 3 cm2
Which of the following pairs of physical quantities does not have the same dimensional formula?
The correct answer is a) work and torque
Measure of two quantities along with the precision of the respective measuring instrument is:
A = 2.5 m/s ± 0.5 m/s
B = 0.10 s ± 0.01 s
The value of AB will be
a) (0.25 ± 0.08) m
b) (0.25 ± 0.5) m
c) (0.25 ± 0.05) m
d) (0.25 ± 0.135) m
The correct answer is a) (0.25 ± 0.08) m
You measure two quantities as A = 1.0 m ± 0.2 m, B = 2.0 m ± 0.2 m. We should report the correct value for √AB as:
The correct answer is d) 1.4 m ± 0.2 m
Which of the following measurements is most precise?
The correct answer is a) 5.00 mm
The mean length of an object is 5 cm. Which of the following measurements is most accurate?
The correct answer is a) 4.9 cm