Electron Emission -Multiple Choice Questions Quiz

Interactive MCQs on “Electron Emission”:

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 the phenomenon where electrons are released from a metal surface when exposed to light?

(a) Photoelectric effect
(b) Thermionic emission
(c) Field emission
(d) Secondary emission

Question 2: Which of the following factors affects the rate of thermionic emission?

(a) Intensity of incident light
(b) Applied electric field
(c) Material's work function
(d) Temperature of the material

Question 3: Which type of electron emission is based on the principle of quantum tunneling?

(a) Field emission
(b) Thermionic emission
(c) Secondary emission
(d) Photoelectric effect

Question 4: Which metal is commonly used as a filament in thermionic emission devices like vacuum tubes?

(a) Gold
(b) Copper
(c) Tungsten
(d) Aluminum

Question 5: What happens to the rate of photoelectric emission when the frequency of incident light is increased?

(a) Increases
(b) Decreases
(c) Remains unchanged
(d) Depends on the intensity of light

Question 6: Which phenomenon leads to the emission of electrons when a charged particle approaches a metal surface and induces the release of electrons?

(a) Photoelectric effect
(b) Secondary emission
(c) Field emission
(d) Thermionic emission

Question 7: In the photoelectric effect, increasing the intensity of incident light while keeping the frequency constant will:

(a) Increase the kinetic energy of emitted electrons
(b) Decrease the kinetic energy of emitted electrons
(c) Not affect the kinetic energy of emitted electrons
(d) Stop the emission of electrons completely

Question 8: Which of the following factors does NOT influence the work function of a material?

(a) Temperature
(b) Type of material
(c) Surface area of the material
(d) Crystal structure of the material

Question 9: What is the main application of field emission in modern technology?

(a) Cathode-ray tube displays
(b) Solar cells
(c) Semiconductor devices
(d) Nuclear reactors

Question 10: Which scientist experimentally demonstrated the photoelectric effect and provided evidence for the particle-like nature of light?

(a) Thomas Young
(b) Max Planck
(c) Albert Einstein
(d) James Clerk Maxwell