Electricity 12 PDF

Figure 11.7 shows a combination of resistors in which three resistors are connected together between points X and Y. Here, the resistors are said to be connected in parallel. Figure 11.7 Resistors in parallel 11.6.1 Resistors in Series What happ...

Figure 11.7 shows a combination of resistors in which three resistors are connected together between points X and Y. Here, the resistors are said to be connected in parallel. Figure 11.7 Resistors in parallel 11.6.1 Resistors in Series What happens to the value of current when a number of resistors are connected in series in a circuit? What would be their equivalent resistance? Let us try to understand these with the help of the following activities. Activity 11.4 n Join three resistors of different values in series. Connect them with a battery, an ammeter and a plug key, as shown in Fig. 11.6. You may use the resistors of values like 1 Ω, 2 Ω, 3 Ω etc., and a battery of 6 V for performing this Activity. n Plug the key. Note the ammeter reading. n Change the position of ammeter to anywhere in between the resistors. Note the ammeter reading each time. n Do you find any change in the value of current through the ammeter? You will observe that the value of the current in the ammeter is the same, independent of its position in the electric circuit. It means that in a series combination of resistors the current is the same in every part of the circuit or the same current through each resistor. 182 Science 2024-25