imo class 12 vector algebra

The magnitude of the vector a = 3î − 4ĵ + 12k̂ is:

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The magnitude of the vector a = 3î − 4ĵ + 12k̂ is:

  • A. 13
  • B. 14
  • C. 15
  • D. 17

Answer: A) 13

Explanation: Magnitude = √(3² + (−4)² + 12²) = √(9 + 16 + 144) = √169 = 13.

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