Q.

A vector A→ points vertically upward and B→ points towards north. The vector product  A→×B→ is

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a

Zero

b

Along west

c

Along east

d

Vertically downward

answer is B.

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Detailed Solution

Direction of vector A is along z-axis∴ A→=ak^Direction of vector B is towards north∴ B→=bj^ Now     A→×B→=ak^×bj^=ab(−i^)∴ The direction is A→×B→ is along west.
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A vector A→ points vertically upward and B→ points towards north. The vector product  A→×B→ is