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[" 64.A heating coil is labelled "100W,2...

[" 64.A heating coil is labelled "100W,220V" .The coil is cut "],[" in half and the two pieces are joined in parallel to the "],[" same source.The energy now liberated per second is "],[[" (a) "200W," (b) "400W],[" (c) "25W," (d) "50W]]

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