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A potential barrier of 0.3 V exists acro...

A potential barrier of 0.3 V exists across a P-N junction: If an electron with speed `4 xx 10^(5) ms^(-1)` approaches this P-N junction from the N-side, the find the speed with which it will enter the P-side. Given mass of electron `9.1 xx10^(-31) kg`

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