AQA GCSE Triple Science – Physics Practice Test 2026: The All-In-One Resource for Exam Success!

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In a series circuit, how does the current through each component behave?

Current divides between components

The same current flows through all components

Current increases with each component

Current depends on the resistance of the first component only

In a series circuit, the current is the same through all components because there is only one path for the charge to flow; charges have nowhere to split or accumulate. The total current is set by the overall voltage and the total resistance: I = V / R_total. Each component carries that same current, while the voltage across them can differ depending on each component’s resistance. Adding more components in series increases the total resistance, which lowers the current, but it remains the same wherever you measure it in the loop. The other ideas aren’t correct because current does not divide in a series circuit, it does not increase as you move through components, and it isn’t determined by the first resistor alone but by the total resistance of the circuit.