As demonstrated on page 964, we used the principle of charge conservation to derive the formula for total resistance in a parallel circuit. The steps were the following:
- Apply Ohm’s law (in the form I = V/R) to each resistor individually.
- Add the currents through each resistor to get the total current.
- Apply Ohm’s law (in the form R = V/I) to get the total resistance.
Which of the above-listed steps is a statement of Kirchhoff’s first law?
- 1 only
- 2 only
- 1 and 3 only
- 1, 2, and 3