Year 12 Physics
Electric circuits
Current, potential difference and resistance, Ohm law, resistivity, series and parallel circuits, internal resistance and EMF, potential dividers and conservation of charge and energy.
Electric circuits free practice
No timer and no account needed. Check each answer as you go, then read the explanation.
1. A 12 Ω resistor and a 4 Ω resistor in parallel are connected in series with a 5 Ω resistor. What is the total resistance, in ohms?
Your answer is marked as soon as you give it.
Want more of this topic?
- A narrated lesson video that works through the topic, with worked examples
- 100 practice questions at foundation, core and stretch level
- A worked explanation on every answer, and progress you can come back to
The lesson and practice open when you start the 7-day free trial. Cancel before it ends and you pay nothing.