Podcast
Questions and Answers
Which semiconductor device exhibits the described current-voltage (I-V) characteristics, where the curve starts from the origin, curves upwards towards the positive voltage side, and also goes a little bit above the origin on the first quadrant?
Which semiconductor device exhibits the described current-voltage (I-V) characteristics, where the curve starts from the origin, curves upwards towards the positive voltage side, and also goes a little bit above the origin on the first quadrant?
- Photodiode
- Light emitting diode
- Solar cell (correct)
- Zener diode
Considering the I-V characteristics of different diodes, which of the following best describes a diode that generates current even when the voltage is zero?
Considering the I-V characteristics of different diodes, which of the following best describes a diode that generates current even when the voltage is zero?
- A Zener diode operating in the reverse breakdown region.
- A solar cell under illumination. (correct)
- A photodiode in dark conditions.
- A light-emitting diode (LED) under forward bias.
If the described I-V curve were shifted downwards such that it primarily resided in the fourth quadrant (positive voltage, negative current) under normal operating conditions, which device would it most likely represent?
If the described I-V curve were shifted downwards such that it primarily resided in the fourth quadrant (positive voltage, negative current) under normal operating conditions, which device would it most likely represent?
- A photodiode under illumination. (correct)
- A Zener diode in forward bias.
- A light-emitting diode (LED).
- A standard silicon diode.
Which of the following characteristics is unique to the I-V curve of a solar cell compared to other diodes such as LEDs or Zener diodes?
Which of the following characteristics is unique to the I-V curve of a solar cell compared to other diodes such as LEDs or Zener diodes?
Suppose the I-V curve is modified such that the current remains close to zero until a certain voltage and then increases exponentially. Which of the following diodes would best represent this behavior?
Suppose the I-V curve is modified such that the current remains close to zero until a certain voltage and then increases exponentially. Which of the following diodes would best represent this behavior?
Flashcards
Light Emitting Diode (LED)
Light Emitting Diode (LED)
A diode that emits light when current passes through it.
Zener Diode
Zener Diode
A diode designed to operate in reverse breakdown, maintaining a stable voltage.
Photodiode
Photodiode
A diode that converts light into current. Current increases with light intensity
Solar Cell
Solar Cell
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I-V Characteristic
I-V Characteristic
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Study Notes
- The I-V (current-voltage) characteristics depicted in the graph are exhibited by a photodiode.
- A photodiode is a semiconductor device that converts light into an electrical current.
- Photodiodes are designed to operate in reverse bias, meaning a voltage is applied in the opposite direction of the diode's arrow symbol.
- When light shines on the photodiode, it generates a current proportional to the light's intensity.
I-V Characteristics
- The I-V curve of a photodiode shows that in the absence of light, only a small reverse saturation current flows.
- As light intensity increases on the photodiode, the reverse current increases proportionally.
- The graph shows current (I) in milliamperes (mA) and voltage (V) in volts.
- The current remains close to zero until the voltage is above zero, then the current increases.
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Description
Learn about the current-voltage (I-V) characteristics of a photodiode. Photodiodes are semiconductor devices converting light into electrical current, operating in reverse bias. The I-V curve shows that reverse current increases proportionally when light intensity increases.
