Figure 25.16 shows a source (a battery) with emf & = 12 V and internal resistance r = 2 N. (For comparison, the internal resist- ance of a commercial 12-V lead storage battery is only a few thou- sandths of an ohm.) The wires to the left of a and to the right of the ammeter A are not connected to anything. Determine the respec- tive readings Vab and I of the idealized voltmeter V and the ideal- ized ammeter A. A source of emf in an open circuit. V a r = 20, ε = 12 V A

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Figure 25.16 shows a source (a battery) with emf & = 12 V and
internal resistance r = 2 N. (For comparison, the internal resist-
ance of a commercial 12-V lead storage battery is only a few thou-
sandths of an ohm.) The wires to the left of a and to the right of the
ammeter A are not connected to anything. Determine the respec-
tive readings Vab and I of the idealized voltmeter V and the ideal-
ized ammeter A.
A source of emf in an open circuit.
V
a
r = 20, ε = 12 V
A
Transcribed Image Text:Figure 25.16 shows a source (a battery) with emf & = 12 V and internal resistance r = 2 N. (For comparison, the internal resist- ance of a commercial 12-V lead storage battery is only a few thou- sandths of an ohm.) The wires to the left of a and to the right of the ammeter A are not connected to anything. Determine the respec- tive readings Vab and I of the idealized voltmeter V and the ideal- ized ammeter A. A source of emf in an open circuit. V a r = 20, ε = 12 V A
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