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Questions  

The component of a vector r along X-axis will have maximum value, if

a
r is along positive Y-axis
b
r is along positive X-axis
c
r makes an angle of 450 with the X-axis
d
r is along negative Y-axis

detailed solution

Correct option is B

If the vector r⇀makes an angle θ with positive x-axis. Then magnitude of the component of r⇀ along x-axis is rcosθ .Now when θ = 00, cosθ becomes maximum. So option (2) is right.

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