Voltage drop across a resistor depends on the current (following Ohm's law: V = I * R). Voltage drop across a diode is largely independent on the current. For many diode types and applications it's considered constant.
Voltage drop across a resistor depends on the current (following Ohm's law: V = I * R). Voltage drop across a diode is largely independent on the current. For many diode types and applications it's considered constant.