Common errors in student solutions

Common errors in student solutions

• Part a
  • When calculating Tbot , students:
    • were inconsistent.
      ex. use and Req to get I
    • obtained a non-physical answer.
      ex. Tbot < Tj
    • Part b
      • When calculating I through a 1cm2 cross section of the pan, students:
        • found current through entire base of pan.
        • added the currents (I = Isteel + Icopper).

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