when will the earth end

To avoid the risk of electric shocks, the metal of an electrical appliance is 'earthed'. Earthed means to connect the metal case of the appliance to the earth (at zero potential) by means of a metal wire (copper) called the earth wire. One end of t..

The creation of a life form, by a similar life is called reproduction. Reproduction is the extension of life of a species at a given time. It is a means of perpetuation of the species and also multiplies their number. By this process, the individuals transmit life to the next generation and t..

The creation of a life form, by a similar life is called reproduction. Reproduction is the extension of life of a species at a given time. It is a means of perpetuation of the species and also multiplies their number. By this process, the individuals transmit life to the next generation and thereby..

'S' is a large spherical conducting shell of radius few meters. C 1 and C 2 are the two supporting pillars. An insulating material like silk acts like a conveyor belt wound over two pulleys P 1 and P 2 . The pulleys move with the help of a motor. B 1 and B 2 are two spray combs. D is the disc..

The transmission path is limited by the skip distance at one end and the curvature of the Earth at the other. The longest single-hop distance is obtained when the ray is transmitted tangentially to the surface of the Earth, as shown in below figure. For the F 2 layer..

Lightning and Lightning Conductors - During thunderstorms, large amount of electrical charge separation takes place in the clouds. As a result, some regions of the cloud have overall positive charge, while others have overall negative charge. When this separation becomes sufficient, the air ionizes..

An Alternative method of charging body by induction is the earthing process. A positively charged acetate strip is brought near a neutral, insulated conductor. The negative charge is attracted to the positively charged body at the end 'A' and the positive charge is repelled and ..

The gold leaf electroscope is a more sensitive instrument. It consists of a draught proof metal case with glass sides housing the gold leaves. The gold leaves 'L' and 'M' are attached at one end of a vertical metal stem S. At the top the stem has a metal place 'C'. The stem is carefully ..

Universe - Universe consists of all matter and all light and other forms of radiation and energy. It consists of everything that exists anywhere in space and time. The universe includes the earth, everything on the earth and within it and everything in the solar system. All star..

Charging by Induction - In the previous section we saw how a body is charged by friction . Let us now see how we can charge a metallic sphere by induction. Fig (a) shows an uncharged metallic sphere supported on an insulating rod. A charged plastic rod is brought close to the sphere. Free electrons..