Question

In the product $\vec{F}=q(\vec{v}\times\vec{b})$
=$q\vec{v}\times(B\hat i+B \hat j+B_0\hat k)$
For q=1 and $\vec v = 2\hat i+4\hat j+6\hat k$ and $\vec F=4\hat i-20\hat j+12\hat k$
What will be the complete expression for $\vec B$ ?

• A. $6\hat i+6\hat j-8\hat k$
• B. $-8\hat i-8\hat j-6\hat k$
• C. $-6\hat i-6\hat j-8\hat k$
• D. $8\hat i+8\hat j-6\hat k$

Answer 1

Answer: (C)

$-6\hat i-6\hat j-8\hat k$

Answer 2

The correct answer is option (C) : $-6\hat i-6\hat j-8\hat k$