Day 64: Circuits Peer Instruction

Even after a previous physics course with a fantastic focus on conceptual understanding of circuits, my AP Physics 2 students still struggle when reasoning through some scenarios. Today, I posed the following question:


Students agreed that bulb A would again be brighter. They were also able to justify their answer by stating that the current through the bulbs is the same and the resistance of the bulbs is different. What threw them was when I asked which bulb had the greater resistance.

  ##circuits ##peerinstruction  

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