Practice Series Circuit in Physics

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

A circuit in which components are connected end-to-end, so the same current flows through each one.

Like cars on a single-lane road — every car (charge) must pass through every toll booth (component) in order.

Example 1

medium
Three resistors (4 \text{ } \Omega, 6 \text{ } \Omega, 10 \text{ } \Omega) are connected in series to a 20 \text{ V} battery. What is the current and the voltage across each resistor?

Example 2

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Two resistors in series have a total resistance of 15 \text{ } \Omega. If one is 7 \text{ } \Omega, what is the other?

Example 3

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A 6 \text{ V} battery powers a series circuit with a 3 \text{ } \Omega resistor and an unknown resistor. The current is 0.5 \text{ A}. Find the unknown resistance and the power dissipated by each resistor.

Example 4

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Three resistors (4 \text{ } \Omega, 6 \text{ } \Omega, and 2 \text{ } \Omega) are connected in series to a 24 \text{ V} battery. Calculate: (a) total resistance, (b) current, (c) voltage across the 6 \text{ } \Omega resistor.
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