5.4 Magnetic effects of electric currents


Here are experiments our science specialists have selected to support the IB* topic.

The Magnetic Field in a Coil

Experiment #25 from Physics with Vernier

  • Use a Magnetic Field Sensor to measure the field at the center of a coil.
  • Determine the relationship between magnetic field and the number of turns in a coil.
  • Determine the relationship between magnetic field and the current in a coil.
  • Explore the Earth’s magnetic field in your room.

Faraday’s Law: Alternating Current

Experiment #12 from Advanced Physics with Vernier — Beyond Mechanics

In this experiment, you will

  • Collect current vs. time and potential vs. time data for a pair of solenoids.
  • Explain how the magnetic flux through the secondary solenoid depends on the current in the primary.
  • Relate the shape of the graph of potential vs. time in the secondary to that of current vs. time in the primary.
  • Calculate the induced emf produced by alternating current in the primary and compare this to experimental findings.

Educational Standard
International Baccalaureate (IB)
5. Electricity and magnetism

* The IB Diploma Program is an official program of the International Baccalaureate Organization (IBO) which authorizes schools to offer it. The material available here has been developed independently of the IBO and is not endorsed by it.