Discussion
State whether the following is true or false.
A single lightning flash may consist of several return strokes along the same channel.
Answer: D
Correct answer: True
Most negative cloud-to-ground flashes contain three or four return strokes, and some contain more than ten, separated by tens of milliseconds. After the first stroke a dart leader runs down the still-warm channel and initiates the next. The successive strokes are what produce the flickering appearance of a flash, and they matter to protection design, since a struck conductor is subjected to the whole sequence.
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