Q. 11

# Mark the correct alternative in each of the following:

If is a non-zero vector of magnitude ‘a’ and λ is a non-zero scalar, then is a unit vector if

A. λ = 1

B. λ = –1

C. a = |λ|

D.

Answer :

Here,

Now,is unit vector if

i.e.

i.e. |

i.e.

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