Class 11 MCQ Chapter 1 Units and Measurement PART - 2

 

Which of the following physical quantities has the same dimensions as energy?

• a) Force
• b) Power
• c) Work
• d) Pressure
• Answer: c) Work

The dimensional formula of momentum is:

• a) $[MLT^{-1}]$
• b) $[MLT^{-2}]$
• c) $[ML^2T^{-2}]$
• d) $[M^2LT^{-2}]$
• Answer: a) $[MLT^{-1}]$

Which of the following pairs have the same dimensions?

• a) Work and Power
• b) Momentum and Impulse
• c) Pressure and Force
• d) Energy and Force
• Answer: b) Momentum and Impulse

The dimensional formula for pressure is:

• a) $[ML^{-1}T^{-2}]$
• b) $[MLT^{-2}]$
• c) $[M^2L^{-2}T^{-2}]$
• d) $[ML^2T^{-2}]$
• Answer: a) $[ML^{-1}T^{-2}]$

Which of the following quantities has the dimension $[ML^2T^{-2}]$?

• a) Work
• b) Force
• c) Momentum
• d) Power
• Answer: a) Work

The dimension of gravitational constant $G$ is:

• a) $[M^{-1}L^3T^{-2}]$
• b) $[ML^{-3}T^{-2}]$
• c) $[M^2L^{-2}T^{-1}]$
• d) $[ML^2T^{-2}]$
• Answer: a) $[M^{-1}L^3T^{-2}]$

If $E = \frac{1}{2}mv^2$, the dimensions of $E$ are:

• a) $[MLT^{-1}]$
• b) $[ML^2T^{-2}]$
• c) $[ML^{-1}T^{-2}]$
• d) $[ML^2T^{-1}]$
• Answer: b) $[ML^2T^{-2}]$

The dimensional formula of Planck's constant is:

• a) $[ML^2T^{-2}]$
• b) $[ML^2T^{-1}]$
• c) $[MLT^{-2}]$
• d) $[MLT^{-1}]$
• Answer: b) $[ML^2T^{-1}]$

Which of the following quantities is dimensionless?

• a) Refractive index
• b) Force
• c) Pressure
• d) Energy
• Answer: a) Refractive index

The dimension of surface tension is:

• a) $[MLT^{-2}]$
• b) $[MT^{-2}]$
• c) $[ML^0T^{-2}]$
• d) $[ML^2T^{-2}]$
• Answer: c) $[ML^0T^{-2}]$

The dimensions of viscosity are:

• a) $[ML^{-1}T^{-1}]$
• b) $[ML^{-1}T^{-2}]$
• c) $[ML^{-2}T^{-1}]$
• d) $[MLT^{-1}]$
• Answer: a) $[ML^{-1}T^{-1}]$

Dimensional analysis can be used to:

• a) Convert one unit to another
• b) Check the correctness of a physical equation
• c) Determine the dimensions of a new physical quantity
• d) All of the above
• Answer: d) All of the above

Which of the following quantities have the same dimensions as that of angular momentum?

• a) Work
• b) Energy
• c) Planck's constant
• d) Force
• Answer: c) Planck's constant

The dimensional formula of electric field intensity is:

• a) $[MLT^{-3}A^{-1}]$
• b) $[ML^2T^{-2}]$
• c) $[ML^2T^{-1}A^{-1}]$
• d) $[MLT^{-2}A^{-1}]$
• Answer: a) $[MLT^{-3}A^{-1}]$

Dimensional formula of coefficient of viscosity is:

• a) $[ML^{-1}T^{-1}]$
• b) $[M^1L^{-1}T^{-2}]$
• c) $[M^2L^{-1}T^{-2}]$
• d) $[M^1L^{-2}T^{-1}]$
• Answer: a) $[ML^{-1}T^{-1}]$