Question

Exercise 25.37

When switch S in the figure is open, the voltmeter V of the battery reads 3.11 {rm V}. When the switch is closed, the voltmeter reading drops to 2.96 {rm V}, and theammeter A reads 1.64 {rm A}. Assume that the two meters are ideal, so they don't affect the circuit.

Part A
Find the emf.

Part B
Find the internal resistance of the battery.
r =

Part C
Find the circuit resistance R.
R =

Solutions

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