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Question

If a be an unit vector then


A
direction of a is constant
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B
magnitude of a is constant
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C
direction and magnitude of a is constant
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D
any one of direction or magnitude is constant.
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Solution

The correct option is C direction and magnitude of a is constant
For a given unit vector , Magnitude and direction are constant (fixed).
since, a vector cannot have two directions.
Hence, option C.

Physics

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