The battery with lower voltage is charged by the higher voltage just to create balance in the circuits, these are divided into two: All we have done is connected a nine 2 volt cell together to get an 18 volt battery. Often a three 2 volt cell is 6 volt battery and a six 2 volt cell is 12 volts battery. If we connect a 6 volt battery, 5 ampere hour (A) and a 12 volt 5Ah battery in series will give a supply of 18 volts that is 6 volts+12 volts, and 5 Ah. When we connect in series, then we add voltage of batteries together but ampere per hour is different. When we connect batteries in series the voltage is increased. Each parth that is R1, R2, R3 is called a branch. And the third path is from 1-2 to 3-4 to 5-6 to 7-8 then again to 1 back. Another one is from 1-2 to 3-6 to 7-8 and again back to 1. The path is from 1 to 2 then to 7 to 8 and back to 1 again. In the above figure, again we have three resistors, but these form more than one continuous path for current flow. The current flows in clockwise direction from point 1 to point 2 to point 3 to point 4 and then again back to point 1. The characteristics of a series circuit is that there is only one path for current flow. They only identify one resistor from one another. It is noted that the script labeling, those from the little numbers to the lower right letter R, these are unrelated to the resistor values in ohms. Here we have three rosters named as R1, R2, R3 which are connected in the long chain from one terminal of the battery to another terminal. Series and Parallel connections are used in two ways in which more than two circuit components are connected : series and parallel, in the series configuration circuits
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