A2L Item 222

• Description: Identify the correct relationships regarding currents in a circuit.
• Goal: Reasoning regarding circuits
• Source: 283-565 circuit currents
• Keywords: Circuits, Current

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The question for students:

Consider the circuit below. Which statement(s) is correct?<div class="img-center"></div>

1. I_AB = I_BD + I_BC
2. I_BC < I_BD
3. I_BC > I_BD

1. 1 only
2. 2 only
3. 3 only
4. 1 and 2
5. 1 and 3

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Commentary for teachers:

Answer

(4) Students should be encouraged to reason about the currents and not calculate the value of the currents in circuits. Interestingly, if a problem similar to this is given with the potential specified as a number, many students will immediately calculate the currents.

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