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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Physics
Chapter
Units and Dimensions

NTA Abhyas 2020 · Physics · Units and Dimensions

In& a new system of units, the unit of force is 100 N , unit of...

In& a new system of units, the unit of force is 100 N\text{100 N}, unit of length is 10 m\text{10 m} and unit of time is 100 s\text{100 s}. Unit of mass in this system can be expressed as

Options

  1. A105kg{10}^{5} \text{k}\text{g}
  2. B106kg{10}^{6} \text{k}\text{g}
  3. C102kg{10}^{2} \text{k}\text{g}
  4. D103kg{10}^{3} \text{k}\text{g}

Correct answer

A. 105kg{10}^{5} \text{k}\text{g}

Step-by-step solution

Here, force (F) = [MLT–2] = 100 N ...(i)

Length (L) = [L] = 10 m ...(ii)

Time (t) = [T] = 100 s ...(iii)

Substituting values of L and T from Equations. (ii) and (iii) in Equation. (i), we get

M × 10 × (100)–2 = 100

or M×10100×100=100\dfrac{M \times 1 0}{1 0 0 \times 1 0 0} = 1 0 0

or M = 100 × 1000 kg

M=105kg\text{M} = {10}^{5 } \text{kg}
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