1. 3 2 1 1 2 4 3 -1 x
10,000
5,000 20 M
Time (min) y t

2. 3 2 1 1 2 4 3 -1 x
10,000
5,000 20 M
Time (min) y t

3. 3 2 1 1 2 4 3 -1 x
10,000
5,000 20 M
Time (min) y t

4. Example 5 Power Delivered by a Battery The power that a battery supplies to an apparatus such as a laptop depends on the internal resistance of the battery. For a battery of voltage V and internal resistance r, the total power delivered to an apparatus of resistance R (Figure 2) is
(a) Calculate dP/dR, assuming that V and r are constants

5. Example 5 Power Delivered by a Battery The power that a battery supplies to an apparatus such as a laptop depends on the internal resistance of the battery. For a battery of voltage V and internal resistance r, the total power delivered to an apparatus of resistance R (Figure 2) is
(a) Calculate dP/dR, assuming that V and r are constants
(b) Where, in the graph of P versus R, is the tangent line horizontal?