Worksheet: Using Ammeters

In this worksheet, we will practice calculating the resistance needed to correctly calibrate an ammeter so that it can be used for measuring the current in a circuit.


Find the resistance that must be placed in parallel with a 60 Ω galvanometer with a sensitivity of 1.00 mA to allow it to be used as an ammeter with a full-scale reading of 25 A.

  • A2.1×10 Ω
  • B2.9×10 Ω
  • C3.9×10 Ω
  • D2.4×10 Ω
  • E3.3×10 Ω

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