Gunn Effect -Multiple Choice Questions Quiz

Interactive MCQs on “Gunn Effect”:

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 Gunn Effect?

(a) The emission of light from a semiconductor material
(b) The generation of microwave signals in certain semiconductor devices
(c) The phenomenon of superconductivity in semiconductors
(d) The flow of electric current in the depletion region of a diode

Question 2: In which type of semiconductor material does the Gunn Effect occur?

(a) P-type semiconductor
(b) N-type semiconductor
(c) Intrinsic semiconductor
(d) Extrinsic semiconductor

Question 3: Which property of the semiconductor material is essential for the Gunn Effect to occur?

(a) High resistivity
(b) High electron mobility
(c) Low electron density
(d) Low thermal conductivity

Question 4: What is the typical frequency range of microwave signals generated by the Gunn Effect?

(a) Radiofrequency (RF) range
(b) Audio frequency range
(c) Infrared frequency range
(d) Terahertz frequency range

Question 5: What is the primary application of Gunn Diodes?

(a) Light-emitting diodes (LEDs)
(b) Rectifiers in power supplies
(c) Oscillators for microwave signal generation
(d) Voltage regulators

Question 6: What happens to the Gunn Diode's resistance when the electric field increases beyond a certain threshold?

(a) Resistance decreases
(b) Resistance increases
(c) Resistance remains constant
(d) Resistance becomes negative

Question 7: What is the negative resistance region in a Gunn Diode's current-voltage characteristic?

(a) The region where current decreases with increasing voltage
(b) The region where current increases with increasing voltage
(c) The region with zero current
(d) The region with infinite current

Question 8: What happens to the frequency of the microwave signals as the voltage across the Gunn Diode is increased?

(a) Frequency decreases
(b) Frequency remains constant
(c) Frequency increases
(d) Frequency becomes zero

Question 9: Which mode of oscillation is usually observed in Gunn Diodes?

(a) Amplitude modulation (AM)
(b) Frequency modulation (FM)
(c) Continuous wave (CW)
(d) Pulse width modulation (PWM)

Question 10: In which frequency range are Gunn Diodes commonly used?

(a) Low-frequency range (<1 GHz)
(b) Microwave frequency range (1-100 GHz)
(c) Ultraviolet frequency range
(d) X-ray frequency range