A; a LED can have a voltage of 1.8v to 5 or higher voltage whites and red are usually in the low voltage while green and blue are int he range of higher voltage
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.
When a light bulb is rated for 3.2 V it means that it is the maximum operating voltage to be applied to the bulb.
What is the physical meaning of Operating Voltage of detector
The forward voltage of an LED is the voltage that must be applied across the leads of an LED, anode to cathode, in order for the LED to function and turn on.
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 the physical meaning of Operating Voltage of detector
We're talking about high voltage when we talk about the operating voltage of a cathode ray tube (CRT). The operating voltage can vary, as you can imagine. Tens of thousands of volts are not uncommon.
A T8 LED tube has to be used with a ballast to bring the correct voltage to the tube for it to operate correctly. Removing the ballast from the circuit will prevent the tube from operating.
There's no set voltage that'll run ALL led's, it'd depend on the particular led.
The voltage drop across an LED varies, but is typically around 2 volts.
when a LED is subjected to a high voltage it will heat up and burn the internal junction, which will leave the LED open circuit.
the voltage at which voltage collector emmiter & collector current becomes zero