What is voltage?

  There are two types of charges namely positive charge
and negative charge. As we all know these charges are opposite and they
attract . A work is done to separate these two charges through a specific
distance. When these two charges are separated from each other certain amount
of energy is stored in them in the form of potential energy due to its
separation. The difference between their potential energies is known as potential
difference. The unit of potential difference is voltage. It is denoted by V.

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