A series of free GCSE/IGCSE Physics Notes and Lessons.
Diodes and LEDs
In these lessons, we will
• Describe and explain the shape of the current - potential difference graph for a diode.
• Describe what is meant by a light-emitting diode and explain why they are useful.
Diode
The current through the diode flows in one direction only. This is because the diode has a very high resistance in the reverse direction. Therefore, diodes are useful for controlling the flow of current in circuits.
Light-Emitting Diode (LED)
An LED gives off light when a current flows through. LEDs are an extremely energy-efficient source of light.
Diodes - IGCSE Physics
What are diodes? Describe a half-wave rectifier and a full wave rectifier for converting alternating current to direct current.
You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
Diodes and LEDs
In these lessons, we will
• Describe and explain the shape of the current - potential difference graph for a diode.
• Describe what is meant by a light-emitting diode and explain why they are useful.
Diode
The current through the diode flows in one direction only. This is because the diode has a very high resistance in the reverse direction. Therefore, diodes are useful for controlling the flow of current in circuits.
Light-Emitting Diode (LED)
An LED gives off light when a current flows through. LEDs are an extremely energy-efficient source of light.
What are diodes? Describe a half-wave rectifier and a full wave rectifier for converting alternating current to direct current.
Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.
You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
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