what is the difference between drift current and diffusion
current.
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Answer Posted / anjali bhasin
When the flow of carriers is due to an applied voltage the resultant current is called a DRIFT CURRENT .
A second type of current may also exist in a semiconductor .
This current is called DIFFUSION CURRENT,and it flows as a result of a gradient of carrier concentration . A gradient of carrier concentration arises near the boundary of a P-N junction .
The DIFFUSION CURRENT is also be due to the motion of both holes & electrons
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