Vectors

Class 12 · Mathematics · 5 questions

Name: ____________________   Date: ____________

1. The magnitude of the vector 3i + 4j is:

   • A 1
   • B 5
   • C 7
   • D 25

2. The dot product of i and j is:

   • A 0
   • B 1
   • C -1
   • D k

3. If a = (1, 2, 3) and b = (4, 5, 6), then a . b is:

   • A 21
   • B 6
   • C 15
   • D 32

4. i x j equals:

   • A 0
   • B -k
   • C i
   • D k

5. Two vectors are perpendicular when their dot product is:

   • A Their product of magnitudes
   • B Negative
   • C One
   • D Zero