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Question

In physical science, understanding the dimension of a quantity helps to analyze formulas and relationships between variables. Which set of dimensions correctly represents the physical quantity 'force' in terms of mass, length, and time?

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RRB NTPC 2025 Under Graduate CBT 1 Question Paper PDF (20-Jun-2026) (Shift 3)
The correct answer is

mass \(\times\) length \(\times\) time-2

Force is defined as mass times acceleration, and acceleration has dimensions of length per time squared.

Combining these gives the dimensional formula of force as mass \(\times\) length \(\times\) time-2.

The other options incorrectly assign positive or different time and length exponents, not matching the actual dimensional formula of force.

Hence, 'mass \(\times\) length \(\times\) time-2' is the correct answer.

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Similar Questions

  1. A physics lab experiment requires the measurement of temperature using the correct SI unit. Which unit should the student use to record temperature readings according to the SI system?

  2. Which of these is NOT an example of fundamental quantity?

  3. Which combination of SI base units correctly represents the unit of density based on its dimensional formula?


Important Questions from Physical Quantities

  1. Which instrument is used to measure the intensity of light produced by an unknown source in terms of a standard source?

  2. With what do you divide thrust in a liquid to obtain the value of pressure?

  3. Which of the following is a vector quantity?

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  4. Which of the following is a scalar quantity?

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    B. Work done

    C. Force and Area

    D. Force and Distance

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