Question

If A + B =A - B, then the magnitude of B is
d) is equal to
c) is equal tol
b) may
be zero
a) must be zero
and minimum value of magnitude​

Answer 1

Explanation:

Given,

∣

a

−

b

∣=∣

a

+

b

∣

a

2

+b

2

−2abcosθ=a

2

+b

2

+2abcosθ

4abcosθ=0

θ=cos

−1

0=90

∘

Since tha angle between given vectors is 90

∘

The vectors are perpendicular

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Answer 2

Answer:

According to this equation A+B=A-B by looking at this we can conclude that this condition will be satisfied only if the value of B is zero.For Example Let A=5Then equation will be 5+B=5-BB+B=5–52B=0 That implies B=0