Q: For two vectors A and B, |A+B|=|A-B| is always true when

(a) |A|=|B| ≠ 0

(b) A ⊥ B

(c) |A| = |B|≠ 0 and A and B are parallel or anti-parallel

(d) When either |A|or|B| is zero

Ans: (b) & (d)

Science and Education

Q: For two vectors A and B, |A+B|=|A-B| is always true when

(a) |A|=|B| ≠ 0

(b) A ⊥ B

(c) |A| = |B|≠ 0 and A and B are parallel or anti-parallel

(d) When either |A|or|B| is zero

Ans: (b) & (d)