In the circuit below, the battery converts an amount E of chemical energy to electrical energy when charge Q passes through the resistor in time t.
Which expressions give the e.m.f. of the battery and the current in the resistor?

1 )
e.m.f.= EQ , currunt= Q/t
2 )
e.m.f.= EQ , currunt= Qt
e.m.f.= E/Q , currunt= Q/t
4 )
e.m.f.= E/Q , currunt= Qt
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