Question

How will you distinguish between a vector quantity and scalar quantity ?

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Answer 1

Scalar Quantity :-

The quantities which have only magnitude are known as scalar quantities .

For example :- Distance , Speed etc .

Vector Quantities :-

The quantities which have Direction as well as magnitude are referred to vector Quantities.

For example :- Displacement , Velocity etc .

Special Case :-

Let a scalar quantity i.e current . But how it is not vector a scalar ? Because it have both magnitude and direction but still it is a scalar quantity . It is because Current Didn't Follow rule of Vector addition .

So , The quantities which follows the rule of Vector addition are known as vector Quantities . The quantity is not vector whether it has both magnitude and direction .

Answer 2

Explanation:

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A scalar quantity is different from a vector quantity in terms of direction. Scalars don’t have direction whereas vector has. Due to this feature, the scalar quantity can be said to be represented in one dimensional whereas a vector quantity can be multi-dimensional.

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Scalar Quantity :

• It has only the magnitude
• Only one dimensional
• This quantity changes with the change in magnitude
• Normal rules of algebra are applicable here
• One scalar quantity can divide another scalar
• In the example of speed, time, etc, the distance between the points is a scalar quantity, not the direction

Vector Quantity :

• It has direction and magnitude
• It is multidimensional
• This changes with magnitude and direction
• There is a different set of rules known as vector algebra
• One vector cannot divide another vector
• Velocity could be an example because it is a measurement of the rate of change of an object’s position

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