1. In the circuit shown below, the total power dissipated by the circuit is 500W. The power dissipated by the R3 resistor is 80W. We wish to find the following: a. What is the current passing through R4? b. What is the value of R4? C. What is(are) the value(s) of R4 if: i. the current through R3 and R2 are equal? ii. the current through R2 is greater than and the current through R3? iii. the current through R3 is greater than and the current through R2? d. What are the supplied current by the voltage source and the voltage V1? R1 R3 10Ω 202 R4 R2 402 V1

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A: Current: It is the time rate of change of the charges and its unit is Ampere.

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Q: R1 R2 2002 R3 3002 E 1502 110 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.