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Measuring Current
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Measuring Current

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  • 1. The unit of measure for current is the "amp" which has the symbol A. We measure the current using a device called an ammeter. In a circuit this is given the symbol When measuring the current through a component, the ammeter is always connected in series (in the same loop) with that component. A Measuring current A A
  • 2. Experiment: measuring current R 1 1 2 A
    • Set up the circuit as shown above.
    • Measure the current using the ammeter at positions 1 and 2.
    Circuit 1 A
  • 3. R2 1 2 3 A A A
    • Add another component into the circuit.
    • Now measure the current using the ammeter at positions 1, 2 and 3.
    Circuit 2 Experiment: measuring current R1
  • 4. Results Current Position 1 Current Position 2 Current Position 3 Current Position 1 Current Position 2 Circuit 1 Circuit 2
  • 5. Measuring current in parallel circuits
    • Place the ammeter, in turn, at positions 1, 2, 3 and 4.
    • Record the ammeter reading at the points in the table shown.
    A 1 A 2 A 3 A 4 1 2 3 4 A 4 A 3 A 2 A 1 Current (A) Ammeter