Question

When using LEDs on a circuit, the LEDs are not Ohmic because they drop the initial voltage. Approximate the number of volts that 5 LEDs in the same circuit would drop the voltage by?

Answer 1

The voltage drop on 5 LEDs would be five times the voltage drop on a single LED. However, the voltage drop on a single LED deppends on its color, so, if we consider the LED with the smallest voltage drop (among the ones that produce visible light), which is the red one, the voltage drop would be:

`V=5*1.8=9V`

Now, if we consider the white LED, which has a voltage drop of 3.2V, we'll get:

`V=5*3.2=16V`

Note: This is considering the LEDs are connected in series. If the LEDs are connected in parallel, the voltage drop on the circuit will be the same as if a single LED is connected