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If vec(a)= 2 hat(i) - 3hat(j) - hat(k), ...

If `vec(a)= 2 hat(i) - 3hat(j) - hat(k), vec(b) = hat(i) +4hat(j) -2 hat(k)`, then what is `(vec(a) xx vec(b)) xx (vec(a)- vec(b))` is equal to ?

A

A. `2 (vec(a) xx vec(b))`

B

B. `-2 (vec(a) xx vec(b))`

C

C. `(vec(a) xx vec(b))`

D

D. `- (vec(a) xx vec(b))`

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The correct Answer is:
B
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PUNEET DOGRA-VECTOR-Prev Year Questions
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  7. If vec(a)= hat(i) - 2hat(j) + 5hat(k) and vec(b) = 2hat(i) + hat(j) -3...

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  8. If position vectors of two points A and B are 3hat(i)- 2hat(j) + hat(k...

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  12. In a triangle ABC, if taken in order, consider the following statement...

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  13. A spacecraft at hat(i) + 2hat(j) + 3hat(k) is subjected to a force la...

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  14. What is (vec(a)- vec(b)) xx (vec(a) + vec(b)) equal to ?

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  15. Let vec(a).vec(b) and vec(c ) be three mutually perpendicular vectors ...

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  16. If |vec(a) | = 3, |vec(b)|= 4 and |vec(a)- vec(b)|=5, then what si the...

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  17. A unit vector perpendicular to each of the vectors 2hat(i) - hat(j) + ...

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  19. Let |vec(a)| # 0.|vec(b)| ne 0 (vec(a) + vec(b)). (vec(a) + vec(b)) = ...

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  20. If the vectors vec(k) and vec(A) are parallel to each other, then what...

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