BCIT Physics Department

Demonstration Manual

Electricity and Magnetism

Jumping Cow Magnet Demo


- To use a solenoid to launch a magnet into the air.



Instructor Use Only.

Warning: Ensure that no one looks down the solenoid once the circuit is powered up, in case the solenoid fires unexpectedly. The power should be turned off when done.

With the equipment connected as shown, press the button. If the magnet is pointed the right way, it will shoot into the air. A short pulse is sent into the solenoid such that the magnet is pulled into the solenoid to the half-way position, at which point the solenoid turns off.