GEOLOGY

Detailed explanation-1: -Ans. (i) If bar magnet is pushed into the coil of insulated copper wire, galvanometer shows the deflection as current is induced in the coil.

Detailed explanation-2: -Generators supply us with most of the electric current we use. They turn mechanical energy (movement) into electrical energy. Inside a generator, a coil of wire is spun inside a powerful magnetic field. This creates an electric current in the wire.

Detailed explanation-3: -An electromagnet is a magnet whose magnetic field is generated by a current flow. Wire wrapped into a coil is used to make electromagnets. A current flowing through the wire produces a magnetic field focused in the aperture, which serves as the coil’s core.

Detailed explanation-4: -Moving magnetic fields pull and push electrons. Metals such as copper and aluminum have electrons that are loosely held. Moving a magnet around a coil of wire, or moving a coil of wire around a magnet, pushes the electrons in the wire and creates an electrical current.

Detailed explanation-5: -Electromagnetic coils are used in electrical engineering, in applications where electric currents interact with magnetic fields, in devices such as electric motors, generators, inductors, electromagnets, transformers, and sensor coils.