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What happens, when we multiply a vector ...

What happens, when we multiply a vector by `(-2)`

A

direction reverses and unit changes

B

direction reverses and magnitude is doubled

C

direction reverses unchanged and unit change

D

none of these

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The correct Answer is:
2
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ALLEN-BASIC MATHEMATICS USED IN PHYSICS &VECTORS -ADDITON & SUBTRACTION, MULTIPLICATION & DIVISION OF A VECTOR BY A SCALAR
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  7. The maximum number of components into which a vector in space can be r...

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  13. If vecA+ vecB = vecC and A+B+C=0, then the angle between vecA and vec...

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  14. The resultant of vecA & vecB is vecR1. On reversing the vector vecB, ...

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  15. Given that vecP+vecQ = vecP-vecQ. This can be true when :

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  16. Which of the following sets of concurrent force may be in equilibrium?

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  17. If vectors vecA and vecB are such that |vecA+vecB|= |vecA|= |vecB| the...

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  18. What happens, when we multiply a vector by (-2)

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  19. Two vectors, both equal in magnitude, have their resultant equal in ma...

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  20. If the sum of two unit vectors is a unit vector, then magnitude of dif...

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