Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2004PhysicsMathematics in PhysicsActual

If | A B |= 3 A B then the value of | A + B | is:

Options

  1. A(A^2+B^2+A B )^ 1 / 2
  2. B(A^2+B^2+ A B 3 )^ 1 / 2
  3. CA+B
  4. D(A^2+B^2+ 3 A B )^ 1 / 2

Correct answer

A. (A^2+B^2+A B )^ 1 / 2

Step-by-step solution

According to the question aligned & A B = 3 A B & A B = 3 A B & = 3 & =60^ & | A + B |= | A |^2+| B |^2+2|A| B aligned

Practice Mathematics in Physics on Quantrex Academy →

More from Mathematics in Physics

For the vector A making an angle with the negative X-axis and lying in the third quadrant, the standard resolved form is 2026The heat generated in a circuit is given by Q = I^2 R t . If the percentage error in the measurement of Q is 1 % , R is 2 % , and t is 1 % , then the percentage error in the measur 2026What is the relation between the two vectors A = 2 i + 5 j - 6 k and B = i + 5 2 j - 3 k ? 2026A body travels uniformly a distance of (20 0.2) m in a time (4.0 0.4) s. The percentage error in the value of velocity is 2026A vector B is along positive y-axis and its vector product with another vector A is zero; then vector A could be 2026The physical quantity P= a³b² c^ 1/3 d^ 1/4 , where the percentage error in a, b, c, and d are 1 % , 3 2 % , 3 % , and 2 % respectively. Then the percentage error in P is 2026A and B are expressed as A =2 i + j and B = i - j . Unit vector perpendicular to A and B is 2026Given A = 2 i - 2 j + 8 k and B = 2 i - m j + 8 k , if A and B have the same direction, the value of m is 2026 Full Mathematics in Physics list All NEET PYQs