Warning: session_start(): open(/var/lib/php/mod_php/session/sess_4danstottr8599sdbsvbhgqqaf, O_RDWR) failed: No space left on device (28) in /var/www/sites/hebbdemo/html/inc/init.php on line 239

Warning: session_start(): Failed to read session data: files (path: /var/lib/php/mod_php/session) in /var/www/sites/hebbdemo/html/inc/init.php on line 239
Barkhausen Effect [UBC PHAS Demonstration Room Catalog]

User Tools

Site Tools


Barkhausen Effect


Demonstrates existence of magnetic domains.


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


Transformer in Cu shielding, Strong magnet, amplifier, speaker


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


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