A circuit contains a cell, a resistor and a lamp joined in a single closed loop. One ammeter is placed between the cell and the resistor. A second ammeter is placed between the lamp and the cell.
Give the reading on the second ammeter when the first ammeter reads 0.18 A.
Explain why the two ammeters give the same reading.
The lamp is removed and the gap is closed with a length of wire. Explain the effect on the reading of the first ammeter.