Exciton -Multiple Choice Questions Quiz

Interactive MCQs on “Exciton”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1:What is an exciton?

(A) A free electron
(B) A bound state of an electron and a hole
(C) A free hole
(D) A bound state of two electrons

Question 2:How is an exciton formed?

(A) By photon absorption
(B) By electric field application
(C) By thermal excitation
(D) By magnetic field application

Question 3: What type of bond holds the electron and hole together in an exciton?

(A) Ionic bond
(B) Covalent bond
(C) Hydrogen bond
(D) Coulomb attraction

Question 4:What is the main property of an exciton in semiconductors?

(A) They carry charge
(B) They transport energy without charge
(C) They store energy
(D) They block electrical conductivity

Question 5:What is the difference between an exciton and a free electron?

(A) Both are the same
(B) An exciton is a free electron
(C) An exciton is a bound state of electron and hole
(D) A free electron has a positive charge

Question 6:What is the term used for excitons in insulating materials?

(A) Frenkel excitons
(B) Wannier excitons
(C) Mott excitons
(D) Delocalized excitons

Question 7:How do excitons behave in conjugated polymers?

(A) They travel freely
(B) They move with low binding energy
(C) They have high binding energy and recombine quickly
(D) They are absorbed into the material

Question 8:What is the primary significance of excitons in solar cells?

(A) They store energy
(B) They generate electron-hole pairs
(C) They increase energy loss
(D) They prevent electrical conduction

Question 9:What is the typical energy scale of an exciton in semiconductors?

(A) Less than 0.1 eV
(B) 1-2 eV
(C) 3-4 eV
(D) 5-6 eV

Question 10:How does temperature affect excitons in materials?

(A) They become more bound
(B) They dissociate into free electrons and holes
(C) They become invisible
(D) They move faster without dissociation