If the two ends P and N of a P-N junction dio | vedclass

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(A) When a $P-N$ junction is formed,a potential barrier $V_B$ is developed across the junction due to the diffusion of charge carriers.If we connect t

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There will not be a steady current in the circuit.

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(A) When a $P-N$ junction is formed,a potential barrier $V_B$ is developed across the junction due to the diffusion of charge carriers.If we connect the $P$ and $N$ ends with an external wire,the potential difference across the junction is exactly balanced by the contact potential difference (barrier potential).According to Kirchhoff's voltage law,the net electromotive force in the closed loop is zero because the potential barrier acts as an internal potential that opposes any external flow.Therefore,no steady current will flow through the circuit,as the system remains in thermal equilibrium.

If the two ends $P$ and $N$ of a $P-N$ junction diode are joined by a wire,what happens?

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