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NEET UG Unit 2B: Friction, Gravitational and Normal Forces — practice questions — page 2

Explore 78 free Unit 2B: Friction, Gravitational and Normal Forces questions in NEET UG Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 2B: Friction, Gravitational and Normal Forces questions and exercises with answers

Showing questions 31–60 of 78.

As per your syllabus, the kilogram is now defined via which fundamental constant?Read the answer and worked solution →As per your syllabus, the kelvin is defined by fixing which constant?Read the answer and worked solution →As per your syllabus, the unit of PLANE ANGLE in SI is which?Read the answer and worked solution →As per your syllabus, the unit of SOLID ANGLE in SI is which?Read the answer and worked solution →As per your syllabus, the SI unit of ELECTRIC CURRENT is the ampere, defined via the elementary charge fixed at which value?Read the answer and worked solution →As per your syllabus, 1 LITRE equals which SI volume?Read the answer and worked solution →As per your syllabus, 1 STANDARD ATMOSPHERIC PRESSURE (atm) equals approximately which value?Read the answer and worked solution →As per your syllabus, rule, ALL non-zero digits in a measurement are which?Read the answer and worked solution →As per your syllabus, the number of significant figures in 2.308 cm is which?Read the answer and worked solution →As per your syllabus, rule, in a number less than 1, the zeros LEFT of the first non-zero digit are which?Read the answer and worked solution →As per your syllabus, the number of significant figures in 0.007 m² is which?Read the answer and worked solution →As per your syllabus, in a number WITH a decimal point, TRAILING zeros are which?Read the answer and worked solution →As per your syllabus, the number of significant figures in 6.320 J is which?Read the answer and worked solution →As per your syllabus, the number 4 700 m written WITHOUT a decimal has how many significant figures?Read the answer and worked solution →As per your syllabus, in the form a × 10ᵇ all zeros appearing in the base number a are which?Read the answer and worked solution →As per your syllabus, the diameter of Earth ≈ 1.28 × 10⁷ m has order of magnitude equal to which value?Read the answer and worked solution →As per your syllabus, the diameter of a hydrogen atom (≈ 1.06 × 10⁻¹⁰ m) has order of magnitude equal to which value?Read the answer and worked solution →As per your syllabus, rule, exact integers (like 2 in s = 2πr or n in T = t/n) have how many significant figures?Read the answer and worked solution →As per your syllabus, the digit 0 conventionally placed to the LEFT of the decimal in numbers < 1 (e.g. 0.1250) is which?Read the answer and worked solution →As per your syllabus, Ex 1.2, 5.74 g of substance in 1.2 cm³ gives a density of which value to correct significant figures?Read the answer and worked solution →As per your syllabus, the sum 436.32 g + 227.2 g + 0.301 g = 663.821 g should be reported as which value?Read the answer and worked solution →As per your syllabus, the number 2.746 rounded to THREE significant figures is which?Read the answer and worked solution →As per your syllabus, the number 2.745 rounded to THREE significant figures is which?Read the answer and worked solution →As per your syllabus, the number 2.735 rounded to THREE significant figures becomes which?Read the answer and worked solution →As per your syllabus, Ex 1.1, the surface area of a cube of side 7.203 m to appropriate significant figures is which?Read the answer and worked solution →As per your syllabus, Ex 1, the area of a rectangle 16.2 cm × 10.1 cm with each ±0.1 cm uncertainty is approximately which?Read the answer and worked solution →As per your syllabus, the relative error in a measurement of 1.02 g with ±0.01 g uncertainty is approximately which percentage?Read the answer and worked solution →As per your syllabus, in 12.9 g − 7.06 g (each to 3 significant figures), the result must be reported as which?Read the answer and worked solution →As per your syllabus, in multi-step calculations one should retain how many EXTRA digits in intermediate steps?Read the answer and worked solution →As per your syllabus, the dimensional formula of FORCE is which?Read the answer and worked solution →

Worked practice questions

As per your syllabus, the kilogram is now defined via which fundamental constant?

  1. Avogadro number N_A
  2. Boltzmann constant k
  3. Planck constant h
  4. Caesium frequency Δν_Cs
Show answer and solution

Correct answer: C. Planck constant h

syllabus Table 1.1: kg is defined by fixing h = 6.62607015 × 10⁻³⁴ J s. International prototype no longer used.

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As per your syllabus, the kelvin is defined by fixing which constant?

  1. Speed of light c
  2. Boltzmann constant k
  3. Avogadro number N_A
  4. Planck constant h
Show answer and solution

Correct answer: B. Boltzmann constant k

syllabus Table 1.1: kelvin defined via k = 1.380649 × 10⁻²³ J/K. Triple-point of water no longer used.

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As per your syllabus, the unit of PLANE ANGLE in SI is which?

  1. Degree (°)
  2. Radian (rad)
  3. Steradian (sr)
  4. Gradian (gon)
Show answer and solution

Correct answer: B. Radian (rad)

Your syllabus + Fig 1.1: plane angle = arc/radius → rad. Supplementary SI unit, dimensionless.

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