This means that their magnetism is there all the time and cannot be turned on or off as it can with an electromagnet. Converting a magnet to a non-magnet is called demagnetisation. Magnets are ...

It shows how iron filings reveal the magnetic field around a magnet, how charged objects create electric fields that can attract materials, and how gravity creates a gravitational field that pulls ...

Save guides, add subjects and pick up where you left off with your BBC account. A permanent magnet is always magnetic. It has an invisible magnetic field. Only certain materials, such as iron ...

Using an XMC1100 microcontroller development board and a TLV49 3D magnetic sensor, the device is able to track the poles of a magnet in real-time and produce an approximation of what the field ...

Magnetic fields can be found near large magnets such as machines using magnetic resonance imaging (MRI's) and nuclear magnetic resonance (NMR's). The health effects of these magnets aren't fully ...

They sense weak magnetic fields via gaseous forms of alkali metals, such as rubidium or caesium. Within the devices these atoms behave like tiny magnets and are aligned with a beam of laser light ...

(b) neutral wire. (c) earth wire. 3. Draw magnetic field lines around a bar magnet. Name the device which is used to draw magnetic field lines. 4. Why does a compass needle get deflected when ...

The magnetic field lines of a bar magnet can be viewed by using compasses or by shaking iron filings onto a platform above the magnet. Place the magnet on top of the paper in view of the document ...