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Which of the following statement is false for the equation $ \overrightarrow F = q( \overrightarrow V \times \overrightarrow B)$

$\begin {array} {1 1} (a)\;\overrightarrow F\: and\: \overrightarrow V \: are \: always\: perpendicular\: to\: each\: other \\ (b)\;\overrightarrow B\: and\: \overrightarrow V \: are \: always\: perpendicular\: to\: each\: other \\ (c)\;\overrightarrow F\: and\: \overrightarrow B \: are \: always\: perpendicular\: to\: each\: other \\ (d)\;\overrightarrow F\: is \: always\: perpendicular\: to\: both\: \overrightarrow B\: and \: \overrightarrow V \end {array}$

 

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(b) Is not necessarily true
Ans : (b)
answered Feb 21, 2014 by thanvigandhi_1
 

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