Question

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

A
b=0
B
b=1
C
b=2
D
b=4

Solution

## The correct option is A $$b=2$$$$P$$ and $$Q$$ will be parallel if $$\dfrac{2}{1}=\dfrac{b}{1}=\dfrac{2}{1}\ \ \therefore b=2$$Physics

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