What is voltage sags and swells?

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Description : What is the cause of voltage fluctuation?

Description : What can cause a voltage spike?

Description : What is voltage interruption?

Description : What is meant by a voltage surge?

Description : What is internal voltage drop and terminal voltage?

Answer : It is not permissible to just connect the positive terminal to the negative terminal of a cell with a copper wire. It will overheat and get damaged. This happens because the electromotive force (emf) ... than the nominal voltage (emf) of the cell and this lower voltage is called terminal voltage.