Saved Bookmarks
| 1. |
The sum, difference and cross produce of two vectors `A` and `B` are mutually perpendicular ifA. `vec(A)` and `vec(B)` are perpendicular to each other and modulus of `vec(A)` is equal to modulus of `vec(B)`.B. `vec(A)` and `vec(B)` are perpendicular to each otherC. `vec(A)` and `vec(B)` are perpendicular but magnitudes are orbitrary.D. modulus of `vec(A)` = modulus of `vec(B)` and their directions are arbitrary. |
|
Answer» Correct Answer - D `(vec(A) + vec(B)).(vec(A) - vec(B)) = 0 [ :. "two vectors are perpendicular"]` `A^(2) - B^(2) = 0` `A = B` Also `vec(A) + vec(B)` & `vec(A) - vec(B)` are in plane of `vec(A)` & `vec(B)` whereas `vec(A) xx vec(B)` is perpendicular of both of them. |
|