Specification:
Item Type: Electromagnetic Induction Coil
Material: PVC + Brass
The outer diameter of the hole at the bottom of the original coil is: Approx. 40mm/1.6 inch
The height of the round hole at the bottom of the original coil: Approx. 60mm/2.4 inch
The hole diameter at the bottom of the secondary coil is: Approx. 25mm/1.0 inch
The height of the round hole at the bottom of the secondary coil: Approx. 80mm/3.1"

How to use:
1. Study the phenomenon of electromagnetic induction - connect the two ends of the secondary coil B to the two terminals of the ammeter with wires;
When one end of the magnetic bar is used to quickly insert (or remove) the secondary coil, all the gauges of the galvanometer are deviated, indicating that there is an induced current in the secondary coil at this time. This phenomenon is called electromagnetic induction.
2. Check Lenz's Law
Connect the original coil to a 3-4 V DC power supply and place a single-pole switch and 109 sliding rheostat in series into the circuit. Changing the direction of current flowing into the primary coil will change the direction of the induced current in the secondary coil.
Synthesize the above experimental results and analyze them to verify Lenz's law.
3. Study the phenomenon of magnetic induction

Package List:
1 x Primary Coil A
1 x Secondary Coil B
1 x Soft Iron Core C
Note:
1. Since the DC resistor of the original coil is very small, the current cannot be too large, the ignition time should not be too long, and the voltage of the power supply should not exceed 4V DC.
2. Pay attention to protect the plastic frame and do not leave