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The ammeter as an ohmic resistor in a circuit

The ammeter as an ohmic resistor in a circuit

VP3.2.4.1

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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
1	57681 4	Plug-in board safety socket, 20/10
3	57733 4	Resistor, 82 Ω, STE 2/19
1	57752 4	Resistor 4.7 kOhm, STE 2/19
2	531110 4	Multimeter LDanalog 10
1	50148 4	Bridging plugs STE 2/19, set of 10
3	500621 4	Safety experiment cable, 50 cm, red
3	500622 4	Safety experiment cable, 50 cm, blue

Experiment Instructions

PDF (Experiment description)

P3.2.4.1 The ammeter as an ohmic resistor in a circuit

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The ammeter as an ohmic resistor in a circuit

Description

Components of equipment sets

Experiment Instructions

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