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The component of a vector r along X-axis...

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

x makes an angle of `45^(@)` with the X-axis

D

r is along nehnitive Y-axis

Text Solution

Verified by Experts

The correct Answer is:
B
(b) Let r makes asn angle `theta` with positive x-axis component of along X-axis
`r_(x)=|r|costheta`
`(r_(x))_("maximum")=|r|(costheta)_("miximum")`
`=|r|cos0^(@)=|r|`
`(because costhetais maximumof theta=0^(@)`
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