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Question

A vector F1 is along x-axis. If F1.F2 is zero, F2 could be :

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

The correct option is B (^j+^k)
Given: F1F2 so, F2 has to be either in y-z plane or along y-axis or along z-axis.
Only option A satisfies the condition.

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