Two vectors P = 2hat{i} + bhat{j} + 2hat{k} and Q = hat{i} + hat{j} + hat{k} will be parallel if b=

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3-1.Vectors

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Two vectors $P = 2\hat i + b\hat j + 2\hat k$ and $Q = \hat i + \hat j + \hat k$ will be parallel if $b=$ ........

A$0$

B$1$

C$2$

D$-4$

Solution

(c) $P$ and $Q$ will be parallel if $\frac{2}{1} = \frac{b}{1} = \frac{2}{1}$ $\therefore b = 2$

Standard 11

Physics

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