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demonstrations:5_electricity_and_magnetism:5g_magnetic_materials:barkhausen_effect:start

Barkhausen Effect

Description

Demonstrates existence of magnetic domains.

Purpose

To demonstrate the Barkhausen effect as evidence for the existence of magnetic domains.

Apparatus

Transformer in Cu shielding, Strong magnet, amplifier, speaker

Setup

The high impedance winding in a small transformer is connected through shielded cable to a high gain amplifier and speaker. For low level background noise the transformer is surrounded by a copper case except for a small window left in this shielding. With high gain in the amplifier a magnet moved past the window produces noticeable clicking in the speakers. Updated on: 06/12/13

Notes

Demo room information

Location —-
Maker Unknown
Current State Working
demonstrations/5_electricity_and_magnetism/5g_magnetic_materials/barkhausen_effect/start.txt · Last modified: 2019/03/05 17:10 by demoroom