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In a series circuit, which of the following remains constant across all components?
Voltage
Current
Resistance
Power
Current
In a series circuit, there is only one continuous path for the electric charge to flow. Therefore, the rate of flow of charge, which is the electric current (I), remains the same through every component connected in series.
In a series circuit, there is only one continuous path for the electric charge to flow. Therefore, the rate of flow of charge, which is the electric current (I), remains the same through every component connected in series.
Think of a series circuit like water flowing through a single hose; if you connect several sprinklers in a line, the amount of water flowing through every section of the hose remains constant regardless of the sprinklers.
In Series, Same-current: 'ISS' (In Series, Same-current).
ItotalтАЛ=I1тАЛ=I2тАЛ=I3тАЛ тАФ Current conservation in series
VtotalтАЛ=V1тАЛ+V2тАЛ+V3тАЛ тАФ Voltage division in series
According to the Law of Conservation of Charge, current cannot be created or destroyed at any point in a simple series loop. Because there are no branching points (nodes), the number of electrons passing through any cross-section of the wire per unit time must be identical throughout the circuit.
Current is uniform throughout a series circuit.
The total resistance of a series circuit is the algebraic sum of individual resistances: ReqтАЛ=R1тАЛ+R2тАЛ+...+RnтАЛ.
Voltage across components is divided proportionally to their resistances according to Ohm's Law (V=I├ЧR).
Simple to design and construct.
Adding more components increases total resistance.
If one component fails, the entire circuit is broken.
Voltage drops across each individual component.
Decorative serial light bulbs (though modern ones use parallel).
Ammeters are always connected in series to measure the full current flow.
Current (I) is measured in Amperes (A).
Option A (Voltage) varies depending on individual component resistance. Option C (Resistance) changes based on the number of components added. Option D (Power) depends on the specific voltage drop across each component.
B is correct тАФ In a series circuit, current remains constant throughout the entire path because there are no junctions for the charge to divide.
Always remember that in parallel circuits, it is the Voltage (V) that remains constant, while Current (I) divides among the branches.