R1 R4 R5 R9 R12 100 10Ω 102 100 100 R2 200 R15 R7 R10 200 R13 Req 200 202 200 R3 R6 R8 R11 R14 300 30Ω 300 300 300

Q: R₁ = R E www www R₂ = 2R ww R₁=3R www R₂=4R

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Q: 25- 20 Resistor A 15 10 Resistor B 4 8 12 16 20 Voltage/V Current/mA

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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.