Measuring Current 22122021 Learning Objective Use an ammeter

Measuring Current 22/12/2021 Learning Objective: • Use an ammeter with care • Measure and record current in simple series circuits Starter: Drawing Circuit Diagrams A

22/12/2021 Starter: Draw Circuit Diagrams for the following A B D C

Series Circuit 22/12/2021 This is a simple series circuit. In a simple series circuit, everything is connected in one loop across the terminals of the battery. There are no places (junctions) where the current can split lamps

22/12/2021 Series The current goes in one loop only

Circuits digrams 1) A cell, a bulb and a switch “in series” 2) A battery of cells, a switch and two bulbs in series 22/12/2021

22/12/2021 Measuring electric current We can measure the amount of electric current flowing through a circuit using a device called an “ammeter”. A

Measuring Current A A A 22/12/2021 Method “THIS IS THE SAME CIRCUIT” • Build the first circuit. Write down the reading on the ammeter. • Now build the 2 nd circuit. Write down the reading on the ammeter. • Build the 3 rd circuit and write down the ammeter reading.

22/12/2021 Current in a series circuit 2 amps here A A A 2 amps here The current in a series circuit is THE SAME at any point

Conclusion 22/12/2021 • The reading on the _______ shows the amount of _______ flowing around the _______. • The current is the _______ everywhere in the _______. The current is not _______ by the bulbs. Key words: ammeter circuit used up current same