In a series circuit, which statement is true about current and voltage?

• A. Same voltage across all components; currents divide.
• B. Same current through all components; voltages add across components.
• C. Currents are zero; voltages multiply.
• D. Voltage is zero across components.

Answer: (B)

In a series circuit, the same current flows through every component because there is only one path for the charge to take. The total supply voltage is shared among the components: the voltage across each one adds up to the source voltage. This follows Kirchhoff’s voltage idea and is reinforced by Ohm’s law, since each drop is V = I R. With the same current, a component with higher resistance will take a larger share of the voltage, but the current through every component remains the same.

So the true statement is that the current is the same through all components, and the voltages across them add up to the total. The other ideas don’t fit: in series, voltages don’t

all equal the same value unless the resistances are identical, current isn’t zero in a powered loop, and voltage isn’t zero across each component.