Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Semiconductors and Electronic Devices

Question:

Given below are two statements:

Statement I: In light emitting diodes, energy is released in the form of photons when minority carriers recombine with majority carriers near the junction.

Statement II: Light emitting diodes are fabricated using heavily doped p-n junction which emits spontaneous radiation under forward biased condition.

In the light of above statements, choose the correct answer from the options given below:

Options:

Both Statement I and Statement II are true

Both Statement I and Statement II are false

Statement I is correct but Statement II is false

Statement I is incorrect but Statement II is true

Correct Answer:

Both Statement I and Statement II are true

Explanation:

The correct answer is Option (1) → Both Statement I and Statement II are true

Statement I: LED emit photon when at the junction boundary on either side of the junction excess minority carriers are there which recombine with majority carriers near the junctions.

Statement II: LED is a heavily doped P-N junction which under forward bias emits spontaneous radiation.

Hence option (1) Both statement (I) and (II) are true.