R₁ R₂ R₂ R₂
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.
For the following figure (3.7): the bridge circuit in the figure is in equilibrium when R1 = 100 Ohms, R2 = 1000 Ohms, and R3 = 150 Ohms. The circuit has a voltage source of 5 V DC. Determine the value of the resistance Rx.
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