In a p-n junction, under equilibrium, the drift current and the diffusion current are equal in magnitude but mutually opposite in direction and thus balance each other. So net current is zero.
Class 12 Physics NCERT Sample Paper Question Session 2024-2025.
In a p-n junction, under equilibrium, there is no net current. Why?
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In a p-n junction at equilibrium, diffusion of charge carriers (electrons and holes) is balanced by drift due to the built-in electric field of the depletion region. These opposing currents cancel each other out, resulting in no net current flow across the junction under equilibrium conditions.
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