4.5.2. Capacitor and Thevenin Resistance Role

Try these first

1. 1.

   What happens to a diode when the voltage exceeds the cut-in voltage?

   Hint

   Think about the flow of current direction.

2. 2.

   Define Thevenin's equivalent circuit.

   Hint

   Consider how complex circuits can be simplified.

3. 3.

   What is the cut-in voltage of a silicon diode approximately?

   • 0.3V
   • 0.7V
   • 1.0V

   Hint

   Consider standard ranges of silicon diode components.

4. 4.

   When the diode is off, what is the expected current?

   • True (current is 0)
   • False (current is not 0)

   Hint

   Think about the definition of 'off' for electrical components.

5. 5.

   A diode circuit has a cut-in voltage of 0.7V and is connected in series with a 1kΩ resistor. How much output voltage will be across the resistor if the input voltage is 5V?

   Hint

   Apply the diode voltage drop in your calculations.

6. 6.

   If a circuit contains a capacitor of 10μF and is connected to Thevenin equivalent resistance of 1Ω, what will be the cutoff frequency of the resulting high-pass filter?

   Hint

   Remember to use the correct unit conversions.