Which of the following is/ are correct concerning "The working principle of LED"?

electrons travel from the n-type to the p-type and holes in the opposite direction

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n-type silicon has extra electrons to combine with the extra holes of p-type silicon

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p-type silicon has extra electrons to combine with the extra holes of n-type silicon

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Both A and C

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Solution

The correct options are
A n-type silicon has extra electrons to combine with the extra holes of p-type silicon
B electrons travel from the n-type to the p-type and holes in the opposite direction
The Light Emitting Diode is connected in reverse bias, hence it shows the corresponding characteristics.
The electrons travel from n-side to p-side crossing the large potential barrier to application of external potential.

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Similar questions

Which of the following statements are true about semiconductors ?

(a) Silicon doped with electron rich impurity is a p-type semiconductor

(b) Silicon doped with an electron rich impurity is an n-type semiconductor

(d) An electron vacancy increases the conductivity of n-type semiconductor

In an n-type silicon, which of the following statement is true:

(a) Electrons are majority carriers and trivalent atoms are the dopants.

(b) Electrons are minority carriers and pentavalent atoms are the dopants.

(d) Holes are majority carriers and trivalent atoms are the dopants.

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