What is earthing ?
The process of transferring of charge from a charged object to the earth is called earthing. Earthing is provided in buildings to protect us from electrical shocks due to any leakage of electrical current.
Electroscope
The aluminium foil strips receive the same charge from the charged refill through the paper clip (remember that metals are good conductors ofelectricity). The strips carrying similar charges repel each other and they become wide open. Such a device can be used to test whether an object is carrying charge or not. This device is …
How to Protect Ourselves from Lightning
Measures to Protect Ourselves from Lightning (1) No open space is safe during lightning and thunderstorm. A house (or any other building) is a safe place during lightning. we should rush to a safer place like a house or some other building nearby on hearing the thunder and observing the lightning in the sky. (2) Open vehicles are not safe …
What is Lightning conductor ? How will protect ?
Lightning conductor is a device used to protect a building from the effects of lightning. A lightning conductor is made of a thick strip of metal (usually of copper). The top end of lightning conductor is pointed like a sharp spike (or spikes) and it is fixed above the highest point of the building. From the top of the building, the …
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Dangers of Lightning
Dangers of Lightning A flash of lightning carries a lot of electric energy. When lightning strikes a building, its tremendous electric energy can set the building on fire or cause serious damage to its structure. When lightning strikes a tree, it can burn up the tree and damage it by enormous electric energy. When the person …
What is lightning ?
The bright flash of light which we see in the clouds is called lightning. Lightning is an electric discharge in the atmosphere between oppositely charged clouds (or between charged cloud and the earth). Lightning is produced by the electric charges in the sky.
What is electrode ?
An electrode is a conductor of electricity that can carry electric current into non-metals and other poor conductors of electricity. There are two types of electrode: an anode and cathode. The positively charged electrode is called anode and the negatively charged electrode is called cathode.
LEDs (Light Emitting Diodes)
LEDs (Light Emitting Diodes) are available in many colours such as red, green, yellow, blue, white and are increasingly being used for manyapplications, for example in traffic signal lights.LEDs are increasingly being used for lighting. A cluster of white LEDs grouped together forms aLED light source. LED light sources consume less electricity and have longer …
What is full form of LED ?
Light-emitting diode
What is chemical effects of currents ?
The passage of an electric current through a conducting liquid causes chemical reactions.The resulting effects are called chemical effects of currents.