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Which of the following vectors is the unit vector along  F=3i^+4j^+12k^ N  ?

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By Expert Faculty of Sri Chaitanya
a
F^=−113−3i^+4j^+12k^  ​​​ N
b
F^=−1133i^−4j^−12k^   N
c
F→=1133i^+4j^−12k^   N
d
None of these

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detailed solution

Correct option is B

F^=F→F→=−3i^+4j^+12k^ (−3)2+(4)+(12)2= -113(3i^+4j^+12k^)


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