H1 Physics 8867 · objective lesson
Series, parallel and potential-divider networks
Apply common p.d. across parallel branches, common current in series paths, Kirchhoff reasoning and the loaded potential-divider model.
Repair the common break
Common misconception: Current is shared equally by all parallel branches.
Correct model: Apply common p.d. across parallel branches, common current in series paths, Kirchhoff reasoning and the loaded potential-divider model.
Worked transfer
Parallel branches share p.d., not necessarily current. For 6 Ω and 3 Ω in parallel across 12 V, currents are 2 A and 4 A and the source current is 6 A.
Guided practice
Explain why “Current is shared equally by all parallel branches.” fails. Then construct one example that correctly applies series, parallel and potential-divider networks.
Independent practice
A 4.0 kΩ–6.0 kΩ potential divider is connected to 10 V, then a 6.0 kΩ load is placed across the lower resistor. Calculate the loaded output voltage.
Return to the recorded repair plan when the explanation and application are secure enough to re-test.