Question

(A):1/√2î + 1/√2j is a unit vector
(R): The component vectors of a unit vector need not be unit vectors.​

Answer 1

Explanation:

Let

A

=

2

1

i

+

2

1

j

∴

∣

∣

∣

∣

A

∣

∣

∣

∣

=

(

2

1

)

2

+(

2

1

)

2

=

2

1

+

2

1

=

1

=1

It is a unit vector.

Hence, Option A is correct.

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