Recent content by vishnukorde

loadstone ... consisting mainly of magnetite, an ore of iron, is the first known magnet to man. magnetism is a property of ferrous metal, ie, iron and very few allied metals. you will get good info about magnetism here... http://en.wikipedia.org/wiki/Magnetism regards

No, you have not understood it right. See take a small nut and coil it with a piece wire. pass current through it... what you make is an electromagnet... keep it running for sometime. later once the battery is removed...check if the nut still has magnetic field around it. you will notice...

nothing is done before that..! what happens is the core of the electromagnet retains a small part of the magnetic field whenever stopped. small amount of initial magnetic field is enough to get the generator started and in minutes completely magnetizes the core..! this magnetic field is used to...

what is "rotary wheel-like appendages" what exactly do you mean by "rotary wheel-like appendages" what does it mean that we can not use rotary wheel-like appendages?... then what can we use?

heat energy out of 500 w halogen bulb? how much heat energy is liberated out of a 500W halogen bulb??>? what temp is reached in 1 min.

what does this mean,"if it is always perpendicular to the field then it would orbit the field."...why?

please tell the name of a liquid (at room temperature) which is attracted by a magnet. and its constituents does not get seperated.

how much force, if at all. is required to make a particle enter an electric field perpendicularly... eg, to let a charged particle enter a charged capacitor perpendicularly, is external force required??

magnetism is based everywhere.. infact all natural forces together constitute matter, ie an atom is stable because of soo many factors... factor also includes magnetism. hence if we say chemical energy is without magnetism...it is wrong. ofcourse but we can produce electricity without...