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Pick the correct statement from the following.

Pick the correct statement from the following. Correct Answer A scalar quantity has the same value even if the orientation of axis is changed.

The correct answer is option 4) i.e. A scalar quantity has the same value even if the reference axis is changed.

CONCEPT:

  • Scalar quantities: The physical quantities which have only magnitude and no direction are called scalar quantities or scalars.
    • Examples: Mass, volume, density, time, temperature, electric current, Luminious intensity, etc.
  • Vector quantities: The physical quantities which have both magnitude and direction and obey the laws of vector addition are called vector quantities or vectors.
    • Examples Displacement, velocity, force, momentum, etc.


EXPLANATION:

  • Temperature is a scalar quantity that can take negative values. Hence, scalar quantities can have negative values.
  • Scalar quantities are represented with the magnitude and unit of the quantity. It has no direction.
  • Gravitational potential energy is a scalar quantity whose value can change from one point to another. So, scalar quantities can change from one point to another.
  • A scalar quantity is independent of direction. Thus, it has the same value for observers with different orientation of the axis.
  • Therefore, option 4) is the correct statement.

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