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Questions  

The position vector of a particle bis r=[2i+3j+k  while its linear momentum is p = (2i+3j+k). Then its  angular momentum about the origin is

a
2i-4k
b
4i-8k
c
2i-4j+2k
d
4i-8j

detailed solution

Correct option is B

We know that L = r x PHere r=4j and p=2i+3j+k∴L=r×p=4j×(2i+3j+k)=4i−8k

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