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If a particle moves from point P (2, 3, 5) to point Q (3, 4, 5). Its displacement vector be

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$\hat{i} + \hat{j} + 10 \hat{k}$

$\hat{i} + \hat{j} + 5 \hat{k}$

$\hat{i} + \hat{j}$

$2 \hat{i} + 4 \hat{j} + 6 \hat{k}$

answer is C.

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Detailed Solution

Displacement vector: $\vec{r} = Δx \hat{i} + Δy \hat{j} + Δz \hat{k}$

$\Rightarrow \vec{r} = \vec{PQ} = (3 - 2) \hat{i} + (4 - 3) \hat{j} + (5 - 5) \hat{k} = \hat{i} + \hat{j}$

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