McqMate
| Q. |
Which one of the following is a non- dimensional quantity? |
| A. | Gas constant |
| B. | Strain |
| C. | Co-efficient of viscosity |
| D. | Plank's constant |
| Answer» B. Strain | |
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Explanation: A dimensionless quantity is simply a quantity that has no units and therefore no dimensions. A ratio between two numbers is a non-dimensional or dimensionless quantity. Strain which is defined as change in dimension over original dimension has no dimensional formula. So it is a. dimensionless quantity. |
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