1. Car batteries all have something called an \"Amp Hour Rate\". This tells you
ID: 2037374 • Letter: 1
Question
1. Car batteries all have something called an "Amp Hour Rate". This tells you that a car can put out so many amps for one hour before the battery puts out all of its charge and dies. Your car has a 90 A h battery and you accidentally leave your lights on overnight, so when you come back, the battery is dead. What was the total charge that left the battery? How many electrons made up this charge? 2, What is the maximum current that can be put across a 0.1 w, 50 k ? resistor? What about a 1 W, 100 M resistor? Give your answers in mA. 3. You hook up the following resistor for a 9 V power supply. You measure a current of 1.45 mA across 1t Note: the colors from left-to-right are Green-Blue-Red-Gold) a. Draw a circuit diagram of your circuit using appropriate symbols, including your mea- surement device. b. Is the resistor working correctly? Show all your work! 4. For each of the following circuits, A, B, C, and D, will you measure a current across the resistor? Why or why not? Assume the power supply voltage is less than the breakdown voltage for the diodes.Explanation / Answer
1) The battery can be discharged completely in one hour and the maximum current it can give is 90 A.
We can see that
I = Q / t , Q = I x t
Q = 90 A x 1 h = 90 x 60 x 60 = 324000 C
Thus the total charge left the battery is 32400 C
One electron has a charge of 1.6 x 10-19 C
one coulomb = (1 /1.6 ) x 1019 .no. of electrons
1 C = 0.625 x 1019 no. of electrons
324000 C = 202500 x 1019 no of electrons
324000 C = 2.025 x 1024 no. of electrons
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