Series Circuits

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Series Circuits

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Series Circuit Java Troubleshooting Simulations. Includes 4 series circuits with a total of 16 inserted faults.

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Troubleshooting Exercise: Series Circuit

Troubleshooting Exercise: Go to Video Gallery TOC: "1","2", and "3".

Series Circuit Demonstration

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Summary

In a series circuit the current is the same in each resistor or component in the circuit. Thus Vt = IRt, V1 = IR1, Vn = IRn. Thus it follows Ohms law can be reduce to an expression without I. Since measuring current is rarely possible on a multi-layer circuit* board and voltage is usually quit simple.

Vt/Rt = V1/R1 = V2/R2 = Vn/Rn. where the t subscript = total.

An experienced technician can usually determine when the voltage drop across a resistor is not proportional. A novice can simply list the voltage drops in the order of resistance. Measure the drop across the smallest resistance first and the largest resistance last. The voltage drops listed should be in increasing order also.

* Though even DC currents can be measured using the Hall Effect, it is difficult to do so when printed circuit lands are in close proximity and magnetic fields overlap.

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