Question

Which of the following is correct about unit vectors?
(1) Unit vector has unit but no dimension
(3) Unit vector is unitless and dimensionless
(2) Unit vector has both unit and dimension
(4) The magnitude of unit vector is zero
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Answer 1

Explanation:

Answer: Unit vector has both unit and dimensions

Answer 2

Answer:

The correct answer is

(3) Unit vector is unitless and dimensionless

Explanation:

• Unit vector has magnitude of 1,since there is same value in the denominator and numerator,the magnitude is one.
• The unit vector only has direction.
• We know the basic property of a vector is having magnitude and direction both .
• Unit vector also satisfies this
• Unit vector is unitless and dimensionless only.

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