GCSE Physics

Current in Series Circuits

As you know, a series circuit consists of just one loop of wire.
Consequently, a series circuit has just one current*.

For example:

The series circuit below connects a cell*, a lamp and an ammeter*.
The ammeter reads that the current through the lamp is 1.5 A.

Series circuit with cell, lamp and ammeter.

Now we swap the position of the ammeter and the lamp:

Series circuit with cell, lamp and ammeter.

What current will the ammeter read?


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