You should now be comfortable with charge, current, voltage, power, and energy. A 12kA lightning bolt strikes an object for 15 mu s. Consider the following: How much charge is deposited on the object? How many electrons is this? (For comparison, there are approximately 10^28 electrons in the human body.) If the lightning strike discharges across a voltage potential of 250 million volts, what is the lightning bolt’s power? (Is this more or less than 1.21 gigawatts?) How much energy is imparted by the lightning strike? A typical cell phone battery has a charged capacity of 1800 mAh at 3.7 V. If the energy from the lightning strike were harnessed, how many cell phone batteries could be fully charged using this energy?

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