UNITS AND DIMENSIONS | PHYSICS | GUIDELINES AND HIGHLIGHTS | CLASS 11 | MDCAT | NEET
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- เผยแพร่เมื่อ 15 ก.พ. 2023
- UNITS AND DIMENSIONS | PHYSICS | GUIDELINES AND HIGHLIGHTS | CLASS 11 | MDCAT | NEET #mdcat
What are Dimensional Constants?
The physical quantities with dimensions and a fixed value are called dimensional constants. e.g., Gravitational constant (G), Planck’s constant (h), Universal gas constant (R), Velocity of light in a vacuum (C), etc.
What are the Dimensionless quantities?
Dimensionless quantities are those which do not have dimensions but have a fixed value.
Dimensionless quantities without units: Pure numbers, π, e, sin θ, cos θ, tan θ etc.
Dimensionless quantities with units: Angular displacement - radian, Joule’s constant - joule/calorie, etc.
What are Dimensional variables?
Dimensional variables are those physical quantities which have dimensions and do not have a fixed value. e.g.: velocity, acceleration, force, work, power, etc.
What are the Dimensionless variables?
Dimensionless variables are those physical quantities which do not have dimensions and do not have a fixed value. For example Specific gravity, refractive index, the coefficient of friction, Poisson’s ratio, etc.
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