Class XII

Coinitial Vectors are
  1. Two or more vectors having the same final point
  2. Two or more vectors having the same initial point
  3. Two or more force vectors having the same initial point
  4. Two or more pseudo vectors having the same initial point
Zero Vector
  1. A vector whose initial and terminal points coincide
  2. A vector whose initial and final points are different
  3. A vector whose terminal points are at origin
  4. A vector whose initial points are at origin
Unit Vector is
  1. A vector whose direction angle α is unity
  2. A vector whose direction angle γ is unity
  3. A vector whose direction angle β is unity
  4. A vector whose magnitude is unity
If l, m and n are direction cosines of the position vector OP the coordinates of P are
  1. lr, mr and nr
  2. lr, mr and n
  3. lr, m and nr
  4. l, mr and nr
Vectors A and B are equal
  1. if they have the same magnitude
  2. if they have the same magnitude and direction
  3. if they have the same magnitude and opposite direction
  4. if they have the same direction
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