To start off I'd like to clear something up for me. A diode will always drop .7V(Silicon) no matter the voltage or the current, correct? If that is true than a diodes resistance must always be changing.
Next I'm very confused about the question in the attached picture. In the picture there is a resistor in series with another resistor and diode in parallel. The first problem I have is in step one where it says Vd = R2 * I2. I don't understand how the diode's voltage drop is used. I would expect it to be the resistors voltage drop not the diodes. Why is this?
Next, It used KVL to find the voltage for the second resistor. I don't understand how the total voltage was used because shouldn't the first resistor have dropped the voltage?
Is there a name for this type of problem so that I could look up some other ones that explain the problem in more detail?
Thanks.
Next I'm very confused about the question in the attached picture. In the picture there is a resistor in series with another resistor and diode in parallel. The first problem I have is in step one where it says Vd = R2 * I2. I don't understand how the diode's voltage drop is used. I would expect it to be the resistors voltage drop not the diodes. Why is this?
Next, It used KVL to find the voltage for the second resistor. I don't understand how the total voltage was used because shouldn't the first resistor have dropped the voltage?
Is there a name for this type of problem so that I could look up some other ones that explain the problem in more detail?
Thanks.
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