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Explain what is meant by dimensional...

Explain what is meant by dimensional analysis.

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Dimensional analysis is a method in which the principle of homogeneity of dimensions of length, mass and time is used either to check the correctness of the equation or derive an equation or convert unit of a physical quantity from one system into another.
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SUBHASH PUBLICATION-UNITS AND MEASUREMENTS -TWO MARKS QUESTIONS WITH ANSWERS
  1. What are dimensions ? Give an example.

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  2. What is a dimensional formula ? Give an example for a physical...

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  3. What is meant by dimensional equation ? Give an example.

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  4. Give any two examples for a dimensional constant.

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  5. Give any two examples for a dimensionless physical quantity.

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  6. Explain what is meant by dimensional analysis.

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  7. Define the term significant figures with an example.

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  8. What is meant by error in measurements ? Give an example.

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  9. Find the fractional error in the measurement of x = A^mB^ n

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  10. Suggest any two methods of minimizing the errors.

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  11. Distinguish between random error and constant error.

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  12. What is meant by absolute error ?

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  13. Mention the number of significant figures in the following. ...

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  14. Each side is measured to be 7.203 m. What are the total sur...

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  15. If A = (12.0 pm 0.1) cm and B = (8.5 pm 0.5) cm find (i) ...

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  16. If the size of a nucleus (in the range of 10^(-15) to 10^(-14)) is sc...

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  17. Convert 48 kmph in terms ms ^( -1).

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  18. Convert 32.2 ft s ^ ( - 2 ) in terms of ms ^( -2).

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  19. (P + ( a ) / ( V^ 2)) ( V - b ) = RT is the real gas equati...

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  20. Write the dimensional formula for (1) voltage and (2) resis...

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