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The resultant of two vectors `vec(P)` and `vec(Q)` is `vec(R )`. If the magnitude of `vec(Q)` is doubled, the new resultant vector becomes perpendicular to `vec(P)`. Then, the magnitude of `vec(R )` is equal to

A

P+Q

B

Q

C

P

D

`(P+Q)/(2)`

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The correct Answer is:
B
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TARGET PUBLICATION-SCALARS AND VECTORS-Critical Thinking
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