NEET Physics Units and Measurement Class 11 Questions
215 questions
If the unit of force is 100 N, unit of length is 10 m and unit of time is 100 s, what is the unit of mass in this system of units?
Match Column-I with Column-II.
| Column-I | Column-II |
|---|---|
| (a) Mass density | (i) [M L T -2] |
| (b) Speed | (ii) [M 0 L 3 T 0] |
| (c) Volume | (iii) [M 0 L T -1] |
| (d) Force | (iv) [M L -3 T 0] |
1 kilowatt hour (kWh) is equal to
Tick the incorrect statements?
Tick the incorrect statements?
(1) For the formula radius = diameter/2, the factor 2 has infinite significant figures.
(2) Keeping the significant figures in view, the sum of the physical quantities and 0.123 m is 205.3 m.
(3) Keeping the significant figures in view, the radius of a circle is stated as 2.12 cm. Its area should be written as 14.11 cm².
(4) 2.745 rounded off to three significant figures becomes 2.74.
In an experiment to find out the diameter of wire using screw gauge, the following observation were noted:
How many significant figures are present in the number 4.700?
Which of the following statements about significant figures is true?
If the length of a cube is measured as 7.203 m, how many significant figures should the calculated volume of the cube be rounded to?
How many significant figures are present in the measurement 4.700 × 10^2 cm?
Which of the following statements about significant figures is true?
How many significant figures are in the measurement 16.2 cm?
How many significant figures are present in the number 4.700 × 10² cm?
Which of the following statements about significant figures is correct?
Which combination of statements about significant figures is correct?
Which of the following statements about significant figures is correct?
Which of the following statements about significant figures is correct?
Which combination of statements about significant figures is correct?
Which of the following statements about significant figures is correct?
Which of the following statements about significant figures is correct?
Which of the following statements about significant figures is correct?
Assertion (A): Trailing zeros in a number without a decimal point are not significant.
Reason (R): Zeros between two non-zero digits are significant regardless of the decimal point.
Assertion (A): When rounding off the number 2.735 to three significant figures, it becomes 2.73.
Reason (R): If the insignificant digit is 5 and the preceding digit is odd, the preceding digit is raised by 1.
Assertion (A): In scientific notation, all zeros in the base number are significant.
Reason (R): The power of 10 in scientific notation affects the number of significant figures.
Assertion (A): In scientific notation, trailing zeroes in the base number are always significant.
Reason (R): The power of 10 in scientific notation determines the number of significant figures.
Assertion (A): The number of significant figures in a calculated result should be based on the measurement with the least number of significant figures.
Reason (R): When multiplying or dividing, the result should have as many significant figures as the measurement with the least significant figures.
Assertion (A): If the result of a calculation is rounded to four significant figures, it must not have more significant figures than the original data.
Reason (R): The final result of a calculation involving approximate measured values must reflect the uncertainties of the original measured values.
Assertion (A): In scientific notation, trailing zeros in the base number are always significant.
Reason (R): The location of the decimal point does not impact the number of significant figures.
Which of the following numbers has exactly three significant figures?
When rounding the number 7.835 to three significant figures, what should be the final rounded value?
If the mass of a sphere is measured as 5.432 g and its volume as 2.34 cm³, what is the density of the sphere expressed with the correct number of significant figures?
The masses of two objects are measured as 12.3 g and 0.00456 g. When these masses are added, what is the sum reported with the correct number of significant figures?
If the length, breadth, and thickness of a rectangular sheet of metal are 4.234 m, 1.005 m, and 2.01 cm respectively, what is the volume of the sheet in cubic meters to the correct number of significant figures?
Which of the following zeros is not considered significant in the number 0.00340?
Which of the following statements about significant figures is true?
What are the units for fundamental or base quantities called?
Which of the following is considered a fundamental physical quantity?
What is the dimensional formula of velocity?
What is the unit of length commonly used on the atomic scale?
What is the size of a hydrogen atom in angstroms?
What is the unit for plane angle in the SI system?
What is the unit for plane angle in the SI system?
Which of the following statements about significant figures is true?
What is the dimensional formula of acceleration?
Which of the following is NOT a fundamental physical quantity?
What are the units for physical quantities that can be expressed as combinations of fundamental units?
What is the unit of length that is convenient on the atomic scale?
What is the size of a hydrogen atom in angstroms?
What is the unit for plane angle in the SI system?
What is the unit for a solid angle in the SI system?
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