11th Class Punjab Board Exams Quizzes MCQs Quizzes Punjab Physics 11th Class Model Paper Chapter No 4

Question:
If |A + B| = |A – B| then angle between A and B is:

Option A):
90˚
Option B):
180˚
Option C):
45˚
Option D):
120˚

Correct Answer is Option A):
90˚