Feature

●1. Easy to carry: Electromagnetic induction helical coils specialize in the study of electromagnetic induction phenomena, light and portable, easy to carry and use.
●2. Easy to use: easy to use, and can be used in conjunction with bar magnets, ammeters, sliding varistors and other instruments.
●3. Durable: Strong and durable, made of enamelled copper, wear-resistant, not easy to damage, and long service life.
●4. Performance: Designed to demonstrate electromagnetic induction and verify Lenzs law for students. Ideal for teaching physics.
●5. Practical: Physics laboratory equipment auxiliary tools make physics experiment learning more efficient.


Description

Specification:
Material: PVC+Brass
Purpose: Middle and high school physics experiment
Applicable Experiments: Study electromagnetic induction, verify Lenzs law, study magnetic induction phenomenon
The outer diameter of the hole at the bottom of the original coil is: Approx. 22±1mm / 0.9±0.04in
The inner diameter of the hole at the bottom of the original coil is: Approx. 13±0.5mm / 0.5±0.02in
The height of the round hole at the bottom of the original coil: Approx. 60mm / 2.4in
The diameter of the hole at the bottom of the secondary coil is: Approx. 35±1mm / 1.4±0.04in
The inner diameter of the circular hole at the bottom of the secondary coil is: Approx. 49±1mm / 1.9±0.04in
The height of the round hole at the bottom of the secondary coil: Approx. 80mm / 3.1in
Soft Core Length: Approx. 85mm / 3.3in


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 using one end of the bar magnet to quickly insert (or withdraw) the secondary coil, the pointers of the galvanometer are all deflected, indicating that there is an induced current in the secondary coil at this time.
2. Verify Lenzs Law
Experimental method: Observe the change in the direction of current indicated in the galvanometer when the magnet is inserted or withdrawn, and when the polarity of the magnet changes;

Package List:
1 x Primary Coil A
1 x Secondary Coil B
1 x Soft Iron Core C

Note:
1. Since the DC resistance of the original coil is very small, the current can not be too large, the power‑on time should not be too long.
2. Pay attention to protect the plastic frame, and dont let it subject to strong collision or fall on the ground.
3. After the instrument is used, it should be placed in a clean, dry and ventilated place without corrosive gas.