Voltage sources are added when they are series-opposing.

More Questions from Series Circuits

• The total resistance of a series circuit always depends on the highest value resistor in that circuit.
• The total resistance is 35 Ω.
• The total power dissipated in a series resistive circuit exceeds the sum of the resistor powers.
• As additional resistors are added to a series circuit, the total circuit resistance increases.
• A series circuit provides only one path for current between two points.
• In a series circuit, the current flowing out of a resistor won't always equal the current flowing into that resistor.
• The voltage across R1 is 10 volts.
• The sum of all the voltage drops in a series circuit equals the source voltage.
• Using a voltage divider the voltage across R1 is 10 V, R2 is 15 V, and R3 is 30 V.
• To find the total current in series, add the individual currents.

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