ทำการทดลองคือ เมื่อแม่เหล็กกระดุมที

Experiment is when the magnetic studs attached to the ends on both sides of the battery. When you start touching the copper coils to make electrodes per integrated and electric currents flowing in coils of copper wire. Therefore a magnetic field inside the coil of copper wire, a virtual liquid solenoid Coil.

The experiment is When magnetic studs attached to the ends of both sides of the batteries. When exposed to the copper coils to make the electrodes to a comprehensive and current flowing in the coils of copper wire. As a result, the magnetic field inside a coil of copper wire solenoid end.

The experiment. When the magnetic button attached to the both ends of the battery. When exposed to copper coil to make electrodes on comprehensive and the electrical current to flow in the coil copper Thus, causing the magnetic field inside the coil of virtual coil solenoid