When these resistors are placed into a circuit, they will impede the flow of electricity. Ohm’s Law states that V = I R where V= Voltage, I = Current and R = Resistance. The total resistance in the circuit is influenced by the design of the circuit.

By the end of this discussion, you will have demonstrated your ability to:

Use a mathematical formula to solve a technical application problem.

A series circuit has a total resistance of 20 ohms. It has resistances of R1, R2 and R3connected where RT = R1 + R2 + R3. Arbitrarily choose values for R1, R2 and R3. Any numbers that you choose are acceptable as long as the resistance totals 20 ohms. Once you have chosen your values for R1, R2 and R3, assume that they are now connected in a parallel circuit. Use the formula below to find the total resistance in the parallel circuit:

Compare your answer with the resistance of 20 ohms in the series circuit. What causes the difference?

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