Physical Features
- Colour:
- North pole is often painted red and South pole in blue or left uncoloured.
- Base:
- Optionally mounted on a plastic or brass holder.
- Available as a standalone needle for versatile use.
- Weight:
- Less than 1 gram for high sensitivity.
Applications
1. Educational Purposes
- Demonstrating magnetic field lines with bar magnets or solenoids in physics labs.
- Understanding Earth’s magnetic field and compass principles.
2. Navigation
- Used in compact navigation devices for hiking, camping, and orienteering.
3. Scientific Instruments
- Incorporated in galvanometers, magnetometers, and other magnetic field measuring devices.
Additional Features
- Housing:
- Optional 360° rotating housing with degree markings for precise measurements.
Care and Maintenance
- Storage: Keep away from strong magnets and electronic devices to avoid demagnetization.
- Durability: Use anti-corrosion coated needles for long-lasting performance.
