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The component of a vector `r` along X-axis will have maximum value ifA. r is along positive Y-axisB. r is along positive X-axisC. r makes an angle of `45^(@)` with the X-axisD. r is along negative Y-axis |
Answer» Correct Answer - B Let r makes an angle `theta` with positive x-axis component of r along X-axis `r_(x)=|r| cos theta` `(r_(x))_("maximum")=|r| (cos theta)_("maximum")` `=|r| cos 0^(@)=|r| " "` (`:. Costheta ` is maximum of `theta=0^(@)`) As `" " theta=0^(@)`, r is along positive x-axis. |
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