SECTION 2 Basic Electric Circuits Es R2 FIGURE 9-34 Review Questions 11 through 15. To answer Questions 11 through 15, refer to the circuit shown in Figure 9-34. 11. In the circuit shown in Figure 9-34, assume that R, has a resistance of 42 and R2 has a resistance of 20 N. Battery Es has a voltage of 48 V. What is the Thevenin equivalent voltage for this circuit across Terminals A and B? ETHEV = 12. What is the equivalent Thevenin resistance for the circuit described in Question 11? RTHEV = 13. In the circuit shown in Figure 9-34, assume that R, has a resistance of 2.5 N and R, has a resistance of 16 0. Power source Es has a voltage of 20 V. As measured across Terminals A and B, what would be the equivalent Norton current for this circuit? INORTON = 14. What is the equivalent Norton resistance for the circuit described in Question 13? RNORTON = 15. Assume that an 8-2 load resistance is connected across Terminals A and B for the circuit described in Question 13. How much current will flow through the load resistance? ILOAD =

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KVL and KCL

KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.

Sign Convention

Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection and refraction in an easier way.