In a p-n junction diode,the direction of diff | vedclass

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(A) In a $p-n$ junction diode,diffusion current is caused by the concentration gradient of charge carriers.Due to the higher concentration of holes in

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$p-$ region to $n-$ region

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(A) In a $p-n$ junction diode,diffusion current is caused by the concentration gradient of charge carriers.Due to the higher concentration of holes in the $p-$ region,they diffuse into the $n-$ region.Due to the higher concentration of electrons in the $n-$ region,they diffuse into the $p-$ region.By convention,the direction of electric current is the direction of the flow of positive charge (holes).Since holes flow from the $p-$ region to the $n-$ region,the diffusion current flows from the $p-$ region to the $n-$ region.

List-$I$	List-$II$
$(1)$ Planck's constant	$(i)$ $[ML^{-1} T^{-2}]$
$(2)$ Gravitational constant	(ii) $[ML^{-1} T^{-1}]$
$(3)$ Bulk modulus	(iii) $[ML^2 T^{-1}]$
$(4)$ Coefficient of viscosity	(iv) $[M^{-1} L^3 T^{-2}]$

In a $p-n$ junction diode,the direction of diffusion current is from

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