10. For the circuit of Fig. 5.80: a. Find the total resistance, current, and unknown volt- age drops. b. Verify Kirchhoff's voltage law around the closed loop. e. Find the power dissipated by each resistor, and note whether the power delivered is equal to the power dis- sipated. d. If the resistors are available with wattage ratings of 1/2, 1, and 2 W, what minimum wattage rating can be 22 1 10n 5.6 33 1 used for each resistor in this circuit? FIG. 5.81

Q: 20 V

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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.