Diodes Quiz

What is the key feature of a varactor diode?

• C) Frequency modulation

• B) Voltage regulation

• A) Amplification

• D) Rectification

What is the typical capacitance range of a varactor diode?

• B) A few millifarads to a few hundred millifarads

• D) A few nanofarads to a few hundred nanofarads

• A) A few picofarads to several hundred picofarads

• C) A few microfarads to a several hundred microfarads

What is the effect of increasing the reverse bias voltage applied to a varactor diode?

• C) The Q of the diode increases

• A) The junction capacitance increases

• B) The junction capacitance decreases

• D) The Q of the diode decreases

What is the primary function of an LED diode?

• A) To convert electrical energy into light

• B) To regulate current flow in a circuit

• C) To amplify electronic signals

• D) To store electrical energy

What is the primary factor affecting the tuning range of a varactor diode?

• B) Reverse bias voltage

• D) Current

• A) Forward bias voltage

• C) Temperature

What is the primary application of varactor diodes in communication systems?

• D) Voltage regulation

• A) Audio amplification

• B) Power generation

• C) Frequency synthesis

What does the acronym 'LASER' stand for in a laser diode?

• B) Low Amplitude Signal Emission Receiver

• A) Light Amplification by Stimulated Emission of Radiation

• D) Longitudinal Amplification by Stimulated Electron Radiation

• C) Laser Amplification of Signal Energy Radiation

What is the process responsible for the emission of coherent light in a laser diode?

• A) Electroluminescence

• C) Stimulated Emission

• D) Photoluminescence

• B) Spontaneous Emission

What is the primary application of tunneling diodes in electronic circuits?

• A) Voltage regulation

• B) Signal amplification

• C) Oscillation and microwave generation

• D) Rectification

What is the role of doping in the fabrication of tunneling diodes?

• A) Doping increases forward voltage

• D) Doping has no impact on tunneling diode performance

• B) Doping reduces negative resistance

• C) Doping introduces impurities for conductivity