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OpenStudy (anonymous):
WHY ELECTRIC SPARK OCCURS IN SWITCH BOARDS???
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OpenStudy (anonymous):
how the small gap causes the 30000v/cm...can you explain it??why this voltage occurs..plz elaborate
OpenStudy (anonymous):
if the switch board is designed to support aN A.C supply then the moment the switch is on,there will be a quick change in magnetic flux which induces an emf(voltage) and spark given by rate of chage in magnetic flux=induced emf(in a direction opposite to change in magnetic flux)
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