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AIIMS2013PhysicsMathematics in Physics

If a vector 2 i +3 j +8 k is perpendicular to the vector 4 i -4 j + k , then value of is

Options

  1. A-1
  2. B1 2
  3. C- 1 2
  4. D1

Correct answer

B. 1 2

Step-by-step solution

For perpendicular vectors. A B =0 (2 i +3 j +8 k ) (4 i -4 j + k )=08-12+8 =0-4+8 =0 = 1 2 .

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