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A Force F=alphahat(i)+3hat(j)+6hat(k) is...

A Force `F=alphahat(i)+3hat(j)+6hat(k)` is acting at a point `r=2hat(i)-6hat(j)-12hat(k)`. The value of `alpha` for which angular momentum about origin is conserved is

A

1

B

`-1`

C

2

D

Zero

Text Solution

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The correct Answer is:
B
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