A series circuit means that the resistive loads are connected one after another.

Question

A series circuit means that the resistive loads are connected one after another. In this type of circuit, the current is the same in all parts of the circuit. To determine the current, the total resistance must first be calculated. The total resistance is the sum of all the resistances in the circuit. The current is then the supplied voltage divided by the total resistance. Rules for a series circuit: Four loads are connected in series across 110 volts DC. The loads fail to operate. A voltmeter connected in succession across each device reads 0 across the first three loads and 110 volts across the fourth load. What circuit fault is indicated at the fourth load? Four loads are connected are connected in series across 120 volts and a 3-ampere current exists, fails to operate. The voltage across each of the other devices is 40 volts. What circuit fault is indicated?

Explanation / Answer

Answer 1 - The voltmeter which are connected across 3 loads have zero internal resistance which will make a short circuit across loads and equivalent resistance becomes 0 ohm, voltage drop is zero in 0 ohm.

Answer 2- One load have 0 ohm of equivalent resistance that's why no voltage drop across it

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