Page 187 - NCERT Science Class 10 English Medium

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 11.711.7
Figure 11.7 Resistors in parallel
Figure 11.7
Figure
Figure 11.7
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
Activity 11.411.4
Activity 11.4
Activity
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.

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