VIJ JODAN AND VIJ BILO MAF BABAT PRESS NOTE- 18-12-18
Electricity is the set of physical phenomena associated with the presence and motion of matter. In the early days, electricity was considered as not related to magnetism. Later on, many experimental results and the development of Maxwell's equations indicate that both electricity and magnetism are from a single phenomenon: electromagnetism. Various common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others.
The presence of an electric charge, which is either positive or negative, produces an electric field. The movement of electric charges is an electric current and produces a magnetic field.
When a charge is placed in a location with a non-zero electric field, a force will act on it. The magnitude of this force is given by Coulomb's law Thus, if that charge were moved, the electric field would do the work on the electric charge. Thus we can talk about electricity in a certain point in space, which is equal to the work done by an external agent in a unit of positive charge from a arbitrarily selected reference point to point without any acceleration.
VIJ JODAN AND VIJ BILO MAF BABAT PRESS NOTE- 18-12-18
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