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Dimensions Of Physical Quantities - Practice Questions & MCQ
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #JEE Main
Quick Facts
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Dimension, Frequency, angular frequency, angular velocity, velocity gradient, Work, Potential Energy, Kinetic Energy, Torque, Momentum, Impulse , Angular momentum, Angular impulse is considered one of the most asked concept.
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27 Questions around this concept.
Solve by difficulty
A, B, C and D are four different physical quantities having different dimensions. None of them is dimensionless. But we know that the equation AD = C ln(BD) holds true. Then which of the combination is not a meaningful quantity?
Which one of the following represents the correct dimensions of the coefficient of viscosity?
Identify the pair whose dimensions are equal.
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Out of the following pairs which one does not have identical dimensions is
Concepts Covered - 4
Dimension
The dimension of physical quantity may be defined as the power to which fundamental quantities must be raised in order to express the given physical quantities.
For representing dimensions of different quantities, we use the following symbols:
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Mass - M
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Length - L
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Time - T
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Electric current - A
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Temperature - K
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Amount of substance- mol
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Luminous intensity - cd
Frequency, angular frequency, angular velocity, velocity gradient
All these quantities will have the same dimensional formula which is equal to
While the SI unit of Frequency and velocity gradient is ,
And SI unit of angular frequency and angular velocity is
Note:- Angle is a dimensionless quantity
Work, Potential Energy, Kinetic Energy, Torque
All these quantities will have the same dimensional formula which is equal to
All these quantities will have the same unit in the SI system which is equal to
Momentum, Impulse , Angular momentum, Angular impulse
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Momentum and Impulse both have the same dimensional formula which is equal to
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And Both have the same SI unit which is equal to
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Angular Momentum and Angular Impulse have the same dimensional formula which is equal to
and have the same SI unit which is equal to
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Dimension
Frequency, angular frequency, angular velocity, velocity gradient
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