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NEET UG Units and Measurement — practice questions — page 2

Explore 92 free Units and Measurement questions in NEET UG Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Units and Measurement questions and exercises with answers

Showing questions 31–60 of 92.

Units of quantities formed by combining base units are called what?Read the answer and worked solution →A complete set of base units and derived units together is known as what?Read the answer and worked solution →In the CGS system, which was the base unit of mass?Read the answer and worked solution →Which unit is used for solid angle in SI?Read the answer and worked solution →Solid angle is the intercepted area on a sphere divided by what?Read the answer and worked solution →The metre is now defined by fixing the value of which constant?Read the answer and worked solution →Since 2019, the kilogram rests on an exact value of which constant?Read the answer and worked solution →The SI second is based on a hyperfine transition in which atom?Read the answer and worked solution →Which constant, given an exact value in coulombs, now defines the ampere?Read the answer and worked solution →When the mole is used as a unit, what must always be specified?Read the answer and worked solution →At which CGPM were the 2018 SI redefinitions adopted?Read the answer and worked solution →Significant figures are the reliable digits plus which digit?Read the answer and worked solution →How many significant figures does 0.04050 kg have?Read the answer and worked solution →A rod is measured as 30.07 m. How many significant figures?Read the answer and worked solution →A timer reads 0.0062 s. How many significant figures?Read the answer and worked solution →By the rule for whole numbers, how many significant figures does 8100 kg have?Read the answer and worked solution →In scientific notation, how many significant figures does 6.400 x 10^3 g carry?Read the answer and worked solution →Rewriting 3.20 m as 320 cm does what to its significant figures?Read the answer and worked solution →In 0.75, the zero written before the decimal point is what?Read the answer and worked solution →A sheet is 3.6 m by 2.135 m. Its area to correct significant figures is?Read the answer and worked solution →Masses 12.11 g, 3.2 g and 0.456 g are added. The reported sum is?Read the answer and worked solution →How should 5.63 g minus 5.61 g be reported?Read the answer and worked solution →Under the even-odd rule, 4.865 rounded to three significant figures is?Read the answer and worked solution →Round 3.475 to two decimal places using the even-odd convention.Read the answer and worked solution →In a multi-step calculation, intermediate values should keep how many digits?Read the answer and worked solution →The relative error of a value given to n significant figures also depends on what?Read the answer and worked solution →The precision of a measurement depends mainly on what?Read the answer and worked solution →The dimensions of a physical quantity are best described as what?Read the answer and worked solution →Which symbol denotes the dimension of electric current?Read the answer and worked solution →Adding only quantities of the same dimensions is called the principle of what?Read the answer and worked solution →

Worked practice questions

Units of quantities formed by combining base units are called what?

  1. Base units
  2. Derived units
  3. Prefixed units
  4. Natural units
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Correct answer: B. Derived units

Units for derived quantities are built as combinations of the base units, so they are called derived units.

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A complete set of base units and derived units together is known as what?

  1. A unit standard
  2. A system of units
  3. A metric scale
  4. A dimensional set
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Correct answer: B. A system of units

Base and derived units taken together make up a system of units.

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In the CGS system, which was the base unit of mass?

  1. Slug
  2. Gram
  3. Kilogram
  4. Pound
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Correct answer: B. Gram

CGS stands for centimetre, gram and second, so mass was measured in grams.

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