In a series circuit, does the same current flow through all components?

In a series circuit, does the same current flow through all components?

• A. Yes
• B. Sometimes
• C. No
• D. It depends on the components

Answer: (A)

In a series circuit, the same current flows through every component because there is only one path for the electrons to take. The current is the rate at which charge moves, and in a single loop it must be the same at all points; charge cannot pile up at a point in a steady DC circuit, so the amount passing through one component must equal the amount passing through the next. The voltage across each component can be different, depending on the component's resistance, because V = IR. The total supply voltage is shared among the components as you go around the loop, adding up to the source voltage. That’s why the current is the same throughout in a series circuit—it's not divided or altered by the different parts—while the voltages split according to each component’s resistance.

In a series circuit, the same current flows through every component because there is only one path for the electrons to take. The current is the rate at which charge moves, and in a single loop it must be the same at all points; charge cannot pile up at a point in a steady DC circuit, so the amount passing through one component must equal the amount passing through the next.

The voltage across each component can be different, depending on the component's resistance, because V = IR. The total supply voltage is shared among the components as you go around the loop, adding up to the source voltage.

That’s why the current is the same throughout in a series circuit—it's not divided or altered by the different parts—while the voltages split according to each component’s resistance.