GEOLOGY

Detailed explanation-1: -A magnetic field can be created by running electricity through a wire. All magnetic fields are created by moving charged particles. Even the magnet on your fridge is magnetic because it contains electrons that are constantly moving around inside.

Detailed explanation-2: -A magnetic field results from the flow of current through wires or electrical devices and increases in strength as the current increases. The strength of a magnetic field decreases rapidly with increasing distance from its source. Magnetic fields are measured in microteslas (T, or millionths of a tesla).

Detailed explanation-3: -Electric Currents and Magnetism-It was first thought that magnetism had nothing to do with electric charges, but it can be shown that electric charges moving through a wire (i.e., an electric current) will cause a magnetic compass to deflect. Hence, an electric current in a wire generates a magnetic field.

Detailed explanation-4: -Many consumer-electronic devices contain magnets or components and radios that emit electromagnetic fields.

Detailed explanation-5: -An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Electromagnets usually consist of wire wound into a coil.