What is series connection?

Serial connection – this is a join in which the elements are connected only at one end. The sequence is characterized by the fact that it excluded any ramifications.

Serial connection from the parallel is characterized in that in parallel the connection is made, which must be at least two nodes.

Resistors – elements of artificial resistance. Used in electronics as an additional load to reduce the current or voltage of the circuit. How is it implemented?

If you want to reduce current, a series connection of resistors. In this case, the current of each resistance is the same, but potential difference is different. It should be noted that the potential difference – this is the magnitude of the voltage drop, it depends on the resistance of the resistor.

For example, a circuit with a voltage of 220 V is the coil, the resistance of which is 1 Ohm. If one of its ends to file phase, and the second is zero, then in fact it would be a short circuit, since the 1 Ohm – it is too little. There is a huge current, the coil will burn, and chain beat. If the series coil to put two resistors of 500 ohms, short-circuit, and the coil will work as it should.

With a parallel connection, the currents of each branch are different, but voltage is the same. Thus, the current value of each plot depends on the resistance of this area. This scheme is used to increase the voltage drop. For example, the resistance coil designed for 50 V. to include in a network 220 In, it is necessary parallel to it to provide adequate resistance. It will create a voltage drop and the coil will not burn.

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Thus, the parallel and series connections are used in special cases and work according to Ohm's law.

If you are a serial connection of LEDs, it is necessary to remember that in case of failure of at least one of them goes out the whole chain. As already mentioned, the current one, in the cliff, the charges cease to flow, and breaks the chain. If parallel connection does not matter which led is faulty, the rest will remain lit.

If series resistance is carried out using the same resistor values, the overall value of it is equal to the product of one of the resistances on the total number of elements.

If the resistor values are different, then their total resistance will be equal to the sum of resistances of each element.

With a parallel connection of the counting carried out somewhat differently. For example, a circuit of three resistors with values of R1, R2, R3. To get the total circuit resistance in a parallel connection, you need to calculate the sum of reciprocals of the values of these denominations, that is folded three fractions 1/R1 + 1/R2 + 1/R3. Fractions reduced to a common denominator and counts the result. The resulting fraction is flipped and is considered the final value.

In order to find the resistance for any chains, you need to make the calculations. Some specialists try to match the resistors by the method of experiments. However, even in this case, it is necessary to know at least approximately what resistor values can be optimal.