A2L Item 222

Goal: Reasoning regarding circuits

Source: 283-565 circuit currents

Consider the circuit below. Which statement(s) is correct?

  1. IAB = IBD +
    IBC
  2. IBC < IBD
  3. IBC > IBD
  1. 1 only
  2. 2 only
  3. 3 only
  4. 1 and 2
  5. 1 and 3

Commentary:

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.