Fortune-telling magnet scam _ Revealing fortune-telling magnet scam

It is unscientific that cattle people can generate electricity with magnets and copper wires. What is the principle?

It is a scam for liberal arts students to say that winding coils casually and adding magnets, capacitors and motors to light bulbs. The specific deception means are as follows: 1 That is, there is an alternating magnetic field generator under the desk to make the coil generate alternating current. 2 is to disguise the battery as a capacitor. Third, there is a microwave source nearby, which is rectified by an antenna with a bridge diode. Wait a minute. You can do this trick in any way.