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[" When current changes from "+2A" to "-...

[" When current changes from "+2A" to "-2A" in "0.05s" ; an e.m."],[" The coefficient of self inductance of the coil is: "],[[" (1) "0.1H," (2) "0.2H," (3) "0.4H," (4) "0.8H]]

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