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12 Electric Circuits
12.7 Find the equivalent resistance between the terminals x and y of the network
shown in Fig. 12.7.
Fig. 12.7
12.8 A circuit is set up as shown in Fig. 12.8, in which certain resistors are known;
the current in some of the branches has been measured by ammeter.
Calculate
Fig. 12.8
(i) The resistance R in CB
(ii) The potential difference between A and B
(iii) The heat developed per second between A and B.
[Northern Universities of U.K.]
12.9 Five resistances are connected as shown in Fig. 12.9. Find the equivalent resistance between the points A and B.
Fig. 12.9