Physics · 2021
NEET 2021 · 12 September · Code M1 · Q44
In the product F = q ( v × B ) = q v ×( B i + B j + B_0 k ) For q =1 and v =2 i +4 j +6 k and F =4 i -20 j +12 k What will be the complete expression…
In the product
$$\begin{aligned}
\overrightarrow{\mathrm{F}} & =\mathrm{q}(\vec{v} \times \overrightarrow{\mathrm{B}}) \\
& =\mathrm{q} \vec{v} \times\left(\mathrm{B} \hat{i}+\mathrm{B} \hat{j}+\mathrm{B}_0 \hat{k}\right)
\end{aligned}
$$
For $\displaystyle \mathrm{q}=1$ and $\displaystyle \vec{v}=2 \hat{i}+4 \hat{j}+6 \hat{k}$ and
$$\overrightarrow{\mathrm{F}}=4 \hat{i}-20 \hat{j}+12 \hat{k}
$$
What will be the complete expression for $\displaystyle \overrightarrow{\mathrm{B}}$ ?
Official answer
From NTA’s final answer key for this paper.
(2)
$\displaystyle -6 \hat{i}-6 \hat{j}-8 \hat{k}$
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NEET (UG) 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.