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Determining capacitive reactance with a Wien measuring bridge /
Determining capacitive reactance with a Wien measuring bridge

Determining capacitive reactance with a Wien measuring bridge

P3.6.4.1

Schematic circuit diagram: Wien measuring bridge (left) - Maxwell measuring bridge (right) (P3.6.4.1-4)

Determining capacitive reactance with a Wien measuring bridge

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Description
Components of equipment sets
Experiment Instructions

Description

The experiment P3.6.4.1 investigates the principle of a Wien measuring bridge for measuring a capacitive reactance Z₁. In this configuration, Z₂ is a fixed capacitive reactance, Z₃ is a fixed ohmic resistance and Z₄ is a variable ohmic resistance. For zero compensation, the following applies regardless of the frequency of the AC voltage:

An oscilloscope can be used as a zero indicator.

Components of equipment sets

2	576 81 4	Plug-in board safety socket, 20/10
1	577 32 4	Resistor 100 Ohm, STE 2/19
1	577 93 4	Potentiometer, 1 kΩ, 10-turn, STE 4/50
1	578 15 4	Capacitor, 1 µF, bipol., STE 2/19
1	578 16 4	Capacitor, 4.7 µF, bipol., STE 2/19
1	575 302	Oscilloscope 30 MHz, digital, PT1265
1	575 24 4	Screened cable, BNC/4 mm Plug
1	522 621 4	Function generator S 12
1	501 48 4	Bridging plugs STE 2/19, set of 10
1	500 621 4	Safety experiment cable, 50 cm, red
1	500 622 4	Safety experiment cable, 50 cm, blue

Experiment Instructions

PDF (Experiment description)

P3.6.4.1 Determining capacitive reactance with a Wien measuring bridge

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Determining capacitive reactance with a Wien measuring bridge

Description

Components of equipment sets

Experiment Instructions

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