Chapter 28: Q. 19 (page 791)
The voltage across the terminals of a
Short Answer
The battery's internal resistance is
Chapter 28: Q. 19 (page 791)
The voltage across the terminals of a
The battery's internal resistance is
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Get started for freeThe circuit shown in FIGURE P28.48 is inside a
What power is dissipated by the
A battery with internal resistance r is connected to a load resistance R. If R is increased, does the terminal voltage of the battery increase, decrease, or stay the same? Explain.
The battery in FIGURE
a. What is the batteryโs internal resistance?
b. How much power is dissipated inside the battery?
A 12 V car battery dies not so much because its voltage drops but because chemical reactions increase its internal resistance. A good battery connected with jumper cables can both start the engine and recharge the dead battery. Consider the automotive circuit of FIGURE P28.65.
a. How much current could the good battery alone drive through the starter motor?
b. How much current is the dead battery alone able to drive through the starter motor?
c. With the jumper cables attached, how much current passes through the starter motor?
d. With the jumper cables attached, how much current passes through the dead battery, and in which direction?
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