a. The voltage Va for the network of Fig. 6.102 is -1 V. If it suddenly jumped to 20 V, what could have happened to the circuit structure? Localize the problem area.
b. If the voltage Va is 6 V rather than 1 V, try to explain what is wrong about the network construction.
![2440_e8885d20-ab08-49d0-a15e-719a46c6f58b.png](https://secure.tutorsglobe.com/CMSImages/2440_e8885d20-ab08-49d0-a15e-719a46c6f58b.png)