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सदिश \(\vec F =4 \hat i -3 \hat j\) के लंबवत् दूसरा सदिश है

(A) \(4\hat i + 3\hat j\)

(B) \(6\hat i\)

(C) \(7\hat k\)

(D) \(3\hat i - 4\hat j\)

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सही विकल्प है (C) \(7\hat k\)

\(\vec F\), x-y तल में स्थित है, इसलिए z-अक्ष के अनुदिश एक सदिश \(\vec F\) पर लंबवत होगा।

इसलिए, \(7\hat k\), z-अक्ष के अनुदिश सदिश है और \(\vec F\) पर लंबवत है।

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