Ferrite Rod 9mm x 100mm S-1

Ferrite rods are an essential component for demonstrating magnetism and electromagnetism in the classroom. Their high magnetic permeability allows them to concentrate magnetic fields far more effectively than air, making them ideal for hands-on investigations into induction, transformers, electromagnets, and radio technology.

Educational Physics Applications

• Investigating Inductance

Wind a coil of wire around the ferrite rod to create a high inductance coil. Students can compare its inductance with an equivalent air-core coil and investigate how magnetic core materials influence circuit behaviour.

• Building Stronger Electromagnets

Wrap insulated wire around the ferrite rod and apply a low voltage DC supply to create a powerful temporary electromagnet. Students can compare the magnetic strength of ferrite-core and air-core electromagnets by measuring their lifting force.

• Simple Transformer Demonstrations

Mount two separate coils on the same ferrite rod to create a basic transformer. This practical activity clearly demonstrates mutual induction, magnetic coupling, and the principles of step-up and step-down transformers.

• AM Radio and Antenna Experiments

Ferrite rods are widely used as loop-stick antennas in crystal radio and AM receiver projects. Combined with a variable capacitor, they allow students to investigate resonance, radio frequency tuning, and signal reception.

• Exploring Magnetic Permeability

Insert and remove the ferrite rod from an energised coil while monitoring inductance or magnetic field strength. Students can observe how high-permeability materials concentrate magnetic flux and improve magnetic circuit performance.

• Understanding Eddy Current Losses

Ferrite is a ceramic magnetic material with excellent electrical insulation properties. Comparing ferrite with solid iron cores demonstrates why ferrites produce minimal eddy current losses and are widely used in high-frequency electronic circuits.

Curriculum Applications

Suitable for investigations into:

• Electromagnetism
• Magnetic Fields
• Electromagnetic Induction
• Transformers
• Inductance and Coils
• Radio Communications
• Energy Transfer
• Materials Science

Practical Electronics

Ideal for secondary school Physics, STEM and Electronics programs, particularly Years 9–12, where students investigate the relationship between electricity and magnetism through practical experimentation.