Shingles is the reactivation of a viral infection in the nerves to the skin that causes pain, burning, or a tingling sensation, along with an itch and blisters in the skin supplied by the affected nerve. It is caused by the varicella zoster virus[1] , or VZVâthe same virus that causes chickenpox.
Types of electrical circuits. There are three main types of circuits encountered in a domestic situation. They are ring circuits, radial circuits and lighting circuits.
What is an electronic circuit? A circuit is a structure that directs and controls electric currents, presumably to perform some useful function. The very name circuit implies that the structure is closed, something like a loop. Current: Charge is mobile and can flow freely in certain materials, called conductors.