Lagerstroemia speciosa series-parallel connection

Series current. For example, connecting water pipes in series is equivalent to connecting water pipes end to end. No matter whether the connected water pipes are thick or thin, the water flowing through each section is the same. The current in series with resistors is similar. Regardless of the size of each resistor, as long as it is connected in series, the current flowing through each resistor is the same. This is the principle of equal currents.

Parallel water pipes are used to compare the current situation in parallel. If several water pipes with different thicknesses are connected in parallel, the water flowing through the coarse pipe will be large, and the water flowing through the fine pipe will be small. The water flowing through the coarse water pipe plus the water flowing through the fine water pipe is equal to the water flowing through the main water pipe. Similar to the water pipe principle mentioned above, in parallel circuit, the current with small resistance is large, and the current with large resistance is small. The sum of the currents in these two branches is equal to the current in the main circuit, which shows that the current has the principle of shunt.

2. The voltage is different

In the case of series voltage, the voltage drop shared by each resistor in series is equal to the power supply voltage, so series has the function of voltage division. In parallel circuit, the terminal voltage of each resistor in parallel is the same as the power supply voltage, which is called the principle of voltage sharing in parallel circuit.

3. The voltage of power supply is different.

The current flowing through each element in the series circuit is equal everywhere, and the sum of the voltages on each element is equal to the power supply voltage; In a parallel circuit, the voltages at both ends of the elements are equal everywhere, and the sum of the currents flowing through each element is equal to the current of the main line.