A DC circuit will consist of a power source (battery) and resistor. The battery unit is volt and resistor unit is ohm.
The circuit can have more than 1 resistor or more than one in series or parallel. The resistors are made with a material that has a certain resistance per unit of cross section and length.
Adding resistors in series as in (a) is the same as increasing the length of one resistor. We simple add the resistor values. If each resistor is 1 ohm the four in series will be 4 ohms.
Adding resistors in parallel as in (b) is the same as increasing the cross section of 1 resistor. This lowers the resistance. If the value of each resistor is 1 ohm the four in parallel will be 1/4 ohm.
You should be able to solve any resistor network using these formulas.
Divide the circuit into sections and solve each. If you want more info you can go to resistorguide.com.
Adding resistors in series as in (a) is the same as increasing the length of one resistor. We simple add the resistor values. If each resistor is 1 ohm the four in series will be 4 ohms.
Adding resistors in parallel as in (b) is the same as increasing the cross section of 1 resistor. This lowers the resistance. If the value of each resistor is 1 ohm the four in parallel will be 1/4 ohm.
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