Consider the circuit shown. (Intro 1 figure) All wires are considered ideal; that is, they have zero resistance. We will assume for now that all other elements of the circuit are ideal, too: The value of resistance is a constant, the internal resistances of the battery and the ammeter are zero, and the internal resistance of the voltmeter is infinitely large.
Part A
What is the reading V of the voltmeter?
Express your answer in terms of the EMF.
Part B
The voltmeter, as can be seen in the figure, is connected to points 1 and 3. What are the respective voltage differences between points 1 and 2 and between points 2 and 3?
Part C
What is the reading I of the ammeter?
Express your answer in terms of EMF and R
Now assume that the battery has a nonzero internal resistance (but the voltmeter and the ammeter remain ideal). (Intro 2 figure)
Part D
What is the reading of the ammeter now?
Express your answer in terms of EMF, r, and R.
Part E
What is the reading of the voltmeter now?
Express your answer in terms of EMF , r, and R.