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The resultant of two vectors $\large \Vec P$ and $\large \Vec Q$ is $\large \Vec R$ .If the magnitude of $\large \Vec Q$ is doubled, the new resultant becomes perpendicular to $\large \Vec P$ ,then the magnitude of $\large \Vec R$ is

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P2 - Q / 2PQ

P+Q / P-Q

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detailed solution

Correct option is C

Tan 900 = 2Qsinθ/(P+2Qcosθ) (∴magnitude is doubled)⇒

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The resultant of two vectors and is .If the magnitude of is doubled, the new resultant becomes perpendicular to ,then the magnitude of is

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Ready to Test Your Skills?

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The resultant of two vectors $\large \Vec P$ and $\large \Vec Q$ is $\large \Vec R$ .If the magnitude of $\large \Vec Q$ is doubled, the new resultant becomes perpendicular to $\large \Vec P$ ,then the magnitude of $\large \Vec R$ is