The ammeter as an ohmic resistor in a circuit

VP3.2.4.1
The ammeter as an ohmic resistor in a circuit
The ammeter as an ohmic resistor in a circuit

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Description

In the experiment P3.2.4.1, the internal resistance of an ammeter is determined by measuring the voltage which drops at the ammeter during current measurement. It is subsequently shown that the deflection of the ammeter pointer is reduced by half, or that the current measuring range is correspondingly doubled, by connecting a second resistor equal to the internal resistance in parallel to the ammeter.

Components of equipment sets

1 521488 AC/DC power supply 0...12 V/3 A LD
1 57681  4  Plug-in board safety socket, 20/10 LD
3 57733  4  Resistor, 82 Ω, STE 2/19 LD
1 57752  4  Resistor 4.7 kOhm, STE 2/19 LD
2 531110  4  Multimeter LDanalog 10 LD
1 50148  4  Bridging plugs STE 2/19, set of 10 LD
3 500621  4  Safety experiment cable, 50 cm, red LD
3 500622  4  Safety experiment cable, 50 cm, blue LD

Experiment Instructions

PDF (Experiment description) PDF (Experiment description) P3.2.4.1 The ammeter as an ohmic resistor in a circuit
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