R1 = 42 ohms, R2 = 30 ohms, R3 = 73 ohms, R4 = 42 ohms. V1 = 45 V, V2 = 207 V, V3 = 78 V. NOTE: Final answer in TWO decimal places. R1 V1 + www R2 V2 || R3 V3 R4 +
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.
The wires here have zero resistance. Thus, for currents that travel along a wire that has no circuit
element, you can safely omit it and simplify the circuit. After, you can use the Kirchhoff's rules.
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