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Question

A vector A is along +ve x-axis. Another vector B such that A×B=0 could be

A
4^j
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B
4^i
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C
(^i+^j)
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D
(^j+^k)
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Solution

The correct option is B 4^i
Since for two non zero vectors to have 0 cross product, angle between them must be an integral multiple of π, option B is correct.

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