Compass 18mm

A compass 18mm is a small, portable magnetic compass with a diameter of 18mm. It is typically used in physics experiments to measure the direction of a magnetic field. The compass has a magnetized needle that always points to the north, and it is surrounded by a graduated dial that shows the direction of the magnetic field in degrees. Compasses 18mm are used in a variety of physics experiments, including Magnetic field mapping Compasses can be used to map the magnetic field around a magnet or other object. This can be done by placing the compass at different points around the object and recording the direction of the needle. Polarity testing Compasses can be used to test the polarity of a magnet. This is done by placing the compass near the magnet and observing the direction of the needle. If the needle points away from the magnet, then the magnet is negatively charged. If the needle points towards the magnet, then the magnet is positively charged. Experiments with induced currents Compasses can be used to demonstrate the effects of induced currents. This is done by placing the compass near a coil of wire that is carrying an electric current. The needle of the compass will deflect when the current is turned on or off, due to the magnetic field created by the current.