Question:
I - V characteristics of LED is shown correctly by graph
I - V characteristics of LED is shown correctly by graph
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LEDs have higher threshold voltages ($1.8\text{V}$ to $3\text{V}$) compared to Silicon diodes ($0.7\text{V}$).
Updated On: Apr 30, 2026
- d
- b
- a
- c
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The Correct Option is C
Solution and Explanation
Step 1: Concept
An LED (Light Emitting Diode) is a P-N junction diode that operates in forward bias.
Step 2: Characteristic Curve
Like a standard diode, the current is negligible until the "knee voltage" is reached, then increases exponentially. Different colors (materials) have different knee voltages.
Step 3: Analysis of Graphs
Graph (a) typically represents forward bias characteristics showing the threshold/knee voltage effect for different semiconductors used in LEDs.
Step 4: Conclusion
Graph 'a' correctly illustrates LED behavior.
Final Answer:(C)
An LED (Light Emitting Diode) is a P-N junction diode that operates in forward bias.
Step 2: Characteristic Curve
Like a standard diode, the current is negligible until the "knee voltage" is reached, then increases exponentially. Different colors (materials) have different knee voltages.
Step 3: Analysis of Graphs
Graph (a) typically represents forward bias characteristics showing the threshold/knee voltage effect for different semiconductors used in LEDs.
Step 4: Conclusion
Graph 'a' correctly illustrates LED behavior.
Final Answer:(C)
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