For the circuit shown in figure (3), determine the current and voltage for the resistor R3 using the superposition principle. (Refer to Annex for values of R1, R2 and R3). R1= 1892 R2= 30Ω R3=1592 R. V₁ = 30 v = V₂ = 20 v +++ R₂

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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.