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If veca is a non-zero vector of modulus ...

If `veca` is a non-zero vector of modulus a and m is a non-zero scalar, then `mveca` is a unit vector if

A

`m=+-1`

B

`m=|a|`

C

`m=(1)/(|a|)`

D

`m=+-2`

Text Solution

Verified by Experts

The correct Answer is:
C
Since, ma is a unit vector, `|ma|=1`
`implies|m||a|=1`
`implies|m|=(1)/(|a|)impliesm=+-(1)/(|a|)`
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