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Question
What happens if a vector is multiplied by a number 2?
 
Options:
A .  The magnitude of the vector is doubled but its direction remains the same
B .  The magnitude of the vector remains the same but its direction is reversed
C .  The magnitude of the vector id doubled and its direction is reversed
D .  Neither the magnitude nor the direction of the vector  undergo any change
Answer: Option A
:
A
Multiplication of a vector by a real positive number n makes its magnitude n times but does not change thedirection of the vector.
Hence the correct choice is (a).

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