AP Physics C E&M 11.7.A Applying Kirchhoff's Junction Rule

Practise applying the junction rule by conserving charge flow at a circuit node and comparing the currents shown by ideal ammeters at labelled points.

Exam points

Use sum I_in=sum I_out at a labelled circuit junction to compare ideal-ammeter readings.

[Maximum number: 1]

Questions 19-21

Figure for Question 11.7.A—Describe a circuit or elements of a circuit by applying Kirchhoff’s junction rule question 1 — AP Physics C: Electricity & Magnetism

Two 9 V batteries and three identical $600 \Omega$ resistors are connected in a circuit, as shown above. Neglect internal resistance in the batteries and consider all meters to be ideal.

Ammeters are inserted at points I, II, III, and IV. At which of the other points would the ammeter register the same current as the ammeter at point IV ?

I only

III only

I and II only

II and III only

I, II, and III

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11.7.A—Describe a circuit or elements of a circuit by applying Kirchhoff’s junction rule question 1