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Question
In the product `vec"F" = "q" (vec"υ" xx vec"B")`
= `"q" vec"υ" xx ("B"hat"i" +"B"hat"j" + "B"_0hat"k")`
For q = 1 and `vec"υ" = 2hat"i" + 4hat"j" + 6hat"k"` and
`vec"F" = 4hat"i" - 20hat"j" + 12hat"k"`
What will be the complete expression for `vec"B"`?
Options
`6hat"i" + 6hat"j" - 8hat"k"`
`-8hat"i" - 8hat"j" - 6hat"k"`
`- 6hat"i" - 6hat"j" - 8hat"k"`
`8hat"i" + 8hat"j" - 6hat"k"`
MCQ
Solution
`- 6hat"i" - 6hat"j" - 8hat"k"`
shaalaa.com
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