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What else can I help you with?
What is forward current?
This is the current that flows under the application of a forward voltage. For eg. the dc forward current for an LED may be 30 mA when a forward voltage of 2.0V is applied.
Is the working voltage of led is equal to it's knee voltage?
A: LED follows an exponential curve just like a regular diode. However their make up moves the forward voltage from 1.8 volts to 3.2 volts and higher this differs from a regular diode where is the forward voltage is around .6 to.7 volts. Because of the higher voltage across these devices they cannot dissipate much power.
What is the forward breakdown voltage for in4007 diode?
there is no forward breakdown voltage for any diode
Forward current of led?
The forward current of an LED is current that goes from the anode of the LED to the cathode (the forward direction).
What is the difference between voltage forward voltage and voltage drop?
Voltage is the potential difference between the source & any point in the circuit. The forward voltage is the voltage drop across the diode if the voltage at the anode is more positive than the voltage at the cathode (if you connect + to the anode). Voltage drop means, amount of voltage by which voltage across load resistor is less then the source voltage.
Why does a Led have a 470 resistor connected to the LED?
A: That resistor is there to limit the current to the LED it can be any value if the voltage is decreased or increased or no resistor if the voltage across the led is equal to the forward voltage drop.
What is forward current?
This is the current that flows under the application of a forward voltage. For eg. the dc forward current for an LED may be 30 mA when a forward voltage of 2.0V is applied.
Does reverse biasing an LED for a period of time reduce its forward biased threshold voltage?
yes
Will a LED shine brighter if it is connected to a higher voltage?
A LED has a forward voltage drop dependent on it's composition. It is fairly constant within a small range of current flow. If the voltage is too high and the current is not limited, the LED will burn out. The brightness can be varied by varying the available current, but the voltage across the LED remains virtually the same.
Is the working voltage of led is equal to it's knee voltage?
A: LED follows an exponential curve just like a regular diode. However their make up moves the forward voltage from 1.8 volts to 3.2 volts and higher this differs from a regular diode where is the forward voltage is around .6 to.7 volts. Because of the higher voltage across these devices they cannot dissipate much power.
What is a led resistor?
A LED resistor is a resistor used in conjunction with a light-emitting diode (LED) to limit the current flowing through the LED. It prevents excessive current that can damage the LED, ensuring it operates within its specified voltage and current ratings. The value of the resistor is calculated based on the supply voltage, the forward voltage of the LED, and the desired current. This setup is essential in LED circuits to maintain longevity and functionality.
How is the irradiance of an LED affected by the voltage across an LED?
The irradiance of an LED, which measures the power of light emitted per unit area, is influenced by the voltage across it due to the relationship between voltage, current, and light output. As the voltage increases, the current through the LED typically increases, leading to higher light output and thus greater irradiance, provided the LED operates within its specified range. However, exceeding the LED's forward voltage can cause overheating and damage, resulting in reduced efficiency and possibly lower irradiance. Therefore, optimal voltage is crucial for maximizing an LED's performance and irradiance.
Why must an LED always have a resistor connected in series with it?
An LED usually has a resistor connected in series with it because an LED (light emitting diode) is not linear in current to voltage (like a resistor) and has to be operated within specified current and voltage conditions. In most circuits the supply voltage is higher than the forward voltage of the LED so the LED would burn up from too much current without a current limiting resistor in series. The resistor sets the voltage and current to a good operating point (voltage and current) for the LED by dropping some voltage across it. The operating point varies depending on the size, type and manufacturer of an LED so the LED's data is used to select the right resistor size for a given voltage source.
What is the forward breakdown voltage for in4007 diode?
there is no forward breakdown voltage for any diode
Which voltage is greater in thyristor whether forward breakover or reverse breakdown voltage?
One voltage is greater in thyristor whether forward breakover or reverse breakdown voltage. The greater of the two voltages in thyristor is forward breakover voltage.
Forward current of led?
The forward current of an LED is current that goes from the anode of the LED to the cathode (the forward direction).
What does the flat spot indicate in a Led?
A flat spot in a LED's current-voltage (I-V) characteristic curve indicates a region where the LED operates in a constant current mode, meaning that increases in voltage do not significantly increase the current flowing through the device. This can be a sign of saturation, where the LED has reached its maximum output, or it may indicate that the LED is approaching its forward voltage drop. It is important to operate LEDs within their specified range to avoid damage or reduced performance.
