In a p-n junction, a potential barrierof $250 m e V$ exists across the junction. A hole with a kinetic energy of $300 m e V$ approaches the junction. Find the kinetic energy of the hole when it crosses the junction if the hole approached the junction from the p-side.

10 m e V

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40 m e V

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50 m e V

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100 m e V

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Solution

The correct option is B $50 m e V$
Potential Barrier $^{'} d^{'} = 250 m e V$
Initial kinetic energy of holes $= 300 m e V$
We know,
Kinetic energy of the hole decreases when the junction is forward biased and increases when reverse biased in the given p-n junction diode.
So,Final kinetic energy, when hole approached the junction from the p-side will be,
$= (300 - 250) m e V$
$= 50 m e V$

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In a p-n junction, a potential barrierof 250meV exists across the junction. A hole with a kinetic energy of 300meV approaches the junction. Find the kinetic energy of the hole when it crosses the junction if the hole approached the junction from the p-side.

In a p-n junction, a potential barrierof $250 m e V$ exists across the junction. A hole with a kinetic energy of $300 m e V$ approaches the junction. Find the kinetic energy of the hole when it crosses the junction if the hole approached the junction from the p-side.