What is Fuse-:
A fuse is a electrical device it protect the electric circuit against of short circuit.It operate automatically when excessive current is flowing through the circuit. A fuse is nothing more than a short length of wire designed to melt and separate in the event of excessive current.
Fuses are always connected in series with the component(s) to be protected from over current, so that when the fuse blows (opens) it will open the entire circuit and stop current through the component(s). Its essential component is a metal wire or strip that melts when too much current flows through it, thereby interrupting the current.
What is LED (Light-Emitting Diode)-:
An LED or a Light Emitting Diode is semiconductor device that emits light due to electroluminescence effect. An LED is basically a PN Junction Diode, which emits light when forward biased. It does not work reverse biased condition. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes with in the device, releasing energy in the form of photons.
What is Buzzer-:
A buzzer is an electrical device that is used to make a buzzing sound or beeper is an audio signaling device, which may be mechanical, electro-mechanical or piezoelectric (piezo for short). Typical uses of buzzers and beepers include alarm, devices, timers and confirmation of user input such as a mouse click or key-stroke or any externally input apply.
Earth grounding system
What is Earth grounding system-:
Grounding is generally used in AC circuit. Because when a extra high amount of current passing through the circuit then this extra amount of current forwarding in to the ground . In electrical engineering, ground or earth is the reference point in an electrical circuit from.
Which voltages are measured, a common return path for electric current, or a direct physical connection to the Earth. Electrical circuits may be connected to ground (earth) for several reasons. The ground wire is an additional path for electrical current to return safely to the ground without danger to anyone in the event of a short circuit.
If a fault occurs inside the appliance, e.g. a wire or component touches the inside of the casing. There is no danger since the plastic body is an insulator. These appliances don’t have a ground wire in the flex. Some appliances such as power tools are not grounded and instead are doubly insulated.
What is Lamp-:
An electric light is a device that produces visible light from electric current. It is the most common form of artificial lighting and is essential to modern society, providing interior lighting for buildings and exterior light for evening and night time activities. In technical usage, a replaceable component that produces light from electricity is called a lamp.
History Of Lamp :
First lamp invented in the world-: 1875 Henry Woodward patents an electric light bulb. 1876 Pavel Yablochkov invents the Yablochkov candle. The first practical carbon arc lamp, for public street lighting in Paris. 1879 Thomas Edison and Joseph Wilson Swan patent the carbon-thread incandescent lamp.