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.
Resources and Going Further. 1  A great way to learn about circuits is to start making some. Our LED tutorial will show how to light up one or many LEDs. 2  Resistors are one of the most widely used components in circuits. 3  Capacitors are also found in most circuits. As are Diodes.