PHET
Simplified MRI
Cancerous tissues contain more water than normal tissue, which causes the cancerous tissue to resonate longer on the screen and be seen. High school learners can see how MRIs detect tumors in someone's head. Radio transmitters emit their...
Teach Engineering
Visualizing Magnetic Field Lines
Magnetic fields might not be a field of dreams but they are useful. Class members observe the reactions of magnetic fields using a compass, iron filings in a paper container, and iron filings suspended in mineral oil.
Teach Engineering
Magnetic Resonance Imaging
The capstone lesson in a 14-part series focuses on the basics of magnetic resonance imaging and the hardware of the machines. Pupils use this information and the material learned throughout the unit to develop a presentation on safety...
Teach Engineering
Induced EMF in a Coil Wire
Small groups investigate the interaction between a coil of wire and a magnet to create an electromagnetic field and observe the voltage they create. Through further interactions, they realize a conductor can be charged from the...
Teach Engineering
Slinkies as Solenoids
What does an MRI machine have to do with a slinky? This activity challenges learners to run a current through a slinky and use a magnetic field sensor to measure the magnetic field. Groups then change the length of the slinky to see the...
Teach Engineering
Biot-Savart Law
Electrical current going round and round,produces a magnetic field. After a demonstration of the magnetic field surrounding an electrical wire, class members use the provided formula associated with Biot-Savart's Law to calculate the...
Teach Engineering
Both Fields at Once?
An MRI uses both a magnetic and electricity, so how do the two interact with each other? Class members observe the effects on a charged particle when it is subject to both an electrical and magnetic field. The teacher background...
Teach Engineering
May the Magnetic Force Be with You
Class members use mathematics in order to better understand magnetic forces and their interaction on charged particles. After a demonstration of the interaction between a magnet and an electron beam using a CRT computer monitor, learners...
Teach Engineering
Force on a Current Carrying Wire
What do electrical currents have to do with an MRI? Using a simple wire setup and a magnet, class members explore forces used in an MRI by investigating the magnetic force acting on a wire carrying a current.
Teach Engineering
The Grand Challenge
Magnetic resonance imaging, just how safe is it? The introduction to unit study of magnetic resonance imaging technology presents the grand challenge questions of how an MRI machine works, the risks involved, the physics involved, and...
Curated OER
Activity: Slinkies and Magnetic Fields
Your advanced physics class will appreciate this lesson in which they use magnetic field sensors to determine the relationship between the number of turns per meter of a solenoid and the magnetic field produced. The materials for this...
Teach Engineering
Magnetic Fields Matter
Help your young scientists learn which materials are affected by magnetic fields with an activity that presents the information about different types of materials — diamagnetic, paramagnetic, and ferromagnetic — and their interaction...
Teach Engineering
Ampere's Law
Help your class find the the magnetic field of a toroid, a solenoid bent into a circle with an activity that allows the class to see how a loop of wire carrying an electrical charge behaves much like a magnet. The resource provides the...
Teach Engineering
Thrown for a Loop
Round and round it goes. Class members observe a current carrying loop in a magnetic field and calculate its associated torque. They then apply what they have learned to example problems to solve for the torque and to calculate the...
Teach Engineering
Changing Fields
Eddy currents, Faraday's Law and Lenz's Law provide the connection between train brakes and and MRI machines in a lesson that asks teachers to provided the material needed so the pupils can understand the properties of changing magnetic...
Teach Engineering
Solenoids
Metal slinkies, coils of wire, magnetic fields, and MRIs. To determine the safety hazards of MRI machines, class members use the provided formula to calculate the magnetic field along the axis of the solenoid.
Curated OER
Detecting Disease
In this detecting disease activity, students will review the different tools scientists use to identify diseases including the steps of Koch's postulates. This activity has 14 fill in the blank and 4 short answer questions.