A student sets up the circuit shown to measure three quantities.
1 the current in the circuit
2 the electromotive force (e.m.f.) of the cell
3 the potential difference across the lamp
How many ammeters and how many voltmeters are needed?
1 )
ammeters:0 / voltmeters:3
ammeters:1 / voltmeters:2
3 )
ammeters:2 / voltmeters:1
4 )
ammeters:3 / voltmeters:0
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