Ea-7 The Solenoid


To demonstrate the magnetic field due to a solenoid.


  • Solenoid
  • 10 Amp Power Supply
  • Iron Filings
  • Overhead Projector

Solenoid Solenoid 2

Solenoid Circuit and Magnetic Field


The apparatus consists of a solenoid passing through a sheet of perspex. As the power supply voltage is increased to supply a current of 10 amps, iron filings are sprinkled over and around the solenoid. The magnetic field pattern is clearly displayed with the aid of the overhead projector.