$=5 \times(0.2) \times(0.1)(-\hat{\mathrm{i}})$
$=0.1(-\hat{\mathrm{i}})$
$\vec{\tau}=\overrightarrow{\mathrm{M}} \times \overrightarrow{\mathrm{B}}=0.1(-\hat{\mathrm{i}}) \times\left(2 \times 10^{-3}\right)(\hat{\mathrm{j}})$
$=2 \times 10^{-4}(-\hat{\mathrm{k}}) \mathrm{N}-\mathrm{m}$
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$\text { (Given } L=60 l \text { ) }$
Assertion $A:$ Diffusion current in a $p-n$ junction is greater than the drift current in magnitude if the junction is forward biased.
Reason $R:$ Diffusion current in a $p-n$ junction is from the $n$-side to the $p$-side if the junction is forward biased.
In the light of the above statements, choose the most appropriate answer from the options given below
