ks Window Help asun.instructure.com My Grade 201810.84072615 Quiz: Homework #6-E
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ks Window Help asun.instructure.com My Grade 201810.84072615 Quiz: Homework #6-Electricity and Magnetic DQuestion 6 6.25 pts A battery designed for charging cell phones is rated at 6800 mA-h. To the nearest coulomb, how much charge is stored in the battery? Question 7 6.25 pts A battery is connected to a circuit containing a motor, on which the battery does 3470 J of work while moving 345 C of charge through the circuit. To the nearest volt, what is the voltage between the terminals of the battery?Explanation / Answer
A current of 1 A means that 1 coulomb of charge flows past a point in a circuit every second.
Charge = current X time = 6800 mA X 1 hr = 6.8 X 3600 C = 24480 C
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Voltage is the Energy, E per Charge, Q. Voltage is defined as one Joule per Coulomb.
Voltage = Energy E / charge Q = 3470 J / 345 C = 10.058 Volt
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