Question:
Which one of the following is dimensionless quantity?
Which one of the following is dimensionless quantity?
Options:
- a) Stress
- b) Strain
- c) Pressure
- d) Force
- a) Stress
- b) Strain
- c) Pressure
- d) Force
correct answer : b)
Explanation:
Strain is defined as the ratio of change in length to original length. Since it is a ratio of two identical quantities, it is unitless and hence a dimensionless quantity.
Strain is defined as the ratio of change in length to original length. Since it is a ratio of two identical quantities, it is unitless and hence a dimensionless quantity.