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The expression $(\frac{1}{\sqrt{2}} \hat{i} + \frac{1}{\sqrt{2}} \hat{j})$ is a

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Unit vector

Null vector

Vector of magnitude 2

Scalar

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detailed solution

Correct option is A

P→=12i^+12j^ ∴|P→|=122+122=1∴ It is a unit vector.

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The expression 12i^+12j^ is a

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The expression $(\frac{1}{\sqrt{2}} \hat{i} + \frac{1}{\sqrt{2}} \hat{j})$ is a