Question

An external resistor R is connected between the terminals of a battery. The value of R varies. For each R value, the current I in the circuit and the terminal voltage Vab of the battery are measured. The results are plotted in (Figure 1), a graph of Vab versus I that shows the best straight-line fit to the data. Figure 1 of 1 Vab (V) 32.0 28.0 24.0 20.0 2.00 3.00 4.00 5.00 6.00 7.00 8.00 I (A) Part A Use the graph in the figure to calculate the battery's emf. Express your answer to two significant figures and include the appropriate units. E = Value Units Part B Use the graph in the figure to calculate the battery's internal resistance. Express your answer to two significant figures and include the appropriate units. r = Value Units

          An external resistor R is connected between the terminals of a battery. The value of R varies. For each R value, the current I in the circuit and the terminal voltage Vab of the battery are measured. The results are plotted in (Figure 1), a graph of Vab versus I that shows the best straight-line fit to the data.

Figure 1 of 1
Vab (V)
32.0
28.0
24.0
20.0
2.00 3.00 4.00 5.00 6.00 7.00 8.00 I (A)

Part A
Use the graph in the figure to calculate the battery's emf.
Express your answer to two significant figures and include the appropriate units.
E = Value Units

Part B
Use the graph in the figure to calculate the battery's internal resistance.
Express your answer to two significant figures and include the appropriate units.
r = Value Units

An external resistor R is connected between the terminals of a battery. The value of R varies. For each R value, the current I in the circuit and the terminal voltage Vab of the battery are measured. The results are plotted in (Figure 1), a graph of Vab versus I that shows the best straight-line fit to the data.

Figure 1 of 1
Vab (V)
32.0
28.0
24.0
20.0
2.00 3.00 4.00 5.00 6.00 7.00 8.00 I (A)

Part A
Use the graph in the figure to calculate the battery's emf.
Express your answer to two significant figures and include the appropriate units.
E = Value Units

Part B
Use the graph in the figure to calculate the battery's internal resistance.
Express your answer to two significant figures and include the appropriate units.
r = Value Units

Added by Francisco Jose G.

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