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Can you associate vectors with (a) the l...

Can you associate vectors with (a) the length of a wire bent into a loop (b) a plane area (c ) a sphere ? Explain.

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(a) We canot associate a vector with the length of a wire bent into a loop.
(b) We can associate a vector with a plane area. Such a vector is called area vector and its direction is represented by outward drawn normal to the area.
(c ) We can not associate a vector with volume of sphere however a vector can be associated with the area of sphere.
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