If two vectors vec P=hat i+2mhat j+mhat ...

If two vectors `vec P=hat i+2mhat j+mhat k` and `vec Q=4hat i-2hat j+mhat k` are perpendicular to each other.Then,the value of `m` will be

A

1

B

2

C

-1

D

3

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JEE MAINS PREVIOUS YEAR|Exercise PHYSICS (SECTION -B)|10 Videos

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