Page 164 - Basic Electrical Engineering
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Since no current is flowing through the 4 Ω resistor, V CD = V BA = V OC . Point
A is at a higher potential than point B. Equivalent resistance across terminals
A and B is,
Current through the load,
Example 2.25 The resistance of the various arms of a Wheatstone bridge
are shown in Fig. 2.65. The battery has an EMF of 2 V and negligible internal
resistance. Using Thevenin’s theorem, determine the value and direction of
the current in the galvanometer circuit BD.
Figure 2.65
Solution:
Remove the load resistance of 40 Ω between terminals B and D. Calculate
V BD as V OC .
