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The vector vec P =hati+ 12hatj + hatk an...

The vector `vec P =hati+ 12hatj + hatk` and `vec Q= 2hati -a hatj + 4hatk` are perpendicular, then value of a is

A

2

B

1.5

C

`.5`

D

`-1`

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The correct Answer is:
B
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MBD PUBLICATION-VECTOR ANALYSIS-QUESTION BANK
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  4. The condition in which the vectors vec P=3hati - 5 hatj + 5hatk and ve...

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