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Thanks to both for responding to my doubt.

By definition, superconductors are conductors with zero resistance at low temperatures. Do superconductors exist ideally, i mean whether zero resistance is practically possible?

thanks a lot mr.comos. i understood it fully.

electromagnetic waves are created or produced by accelerated charge. but EM WAVES are chargeless? how is it? please clarify folks... thanks in advance

Thanks to all the members who helped clarify my doubt

dear revered members, could u people let me the know the role of capacitors in the ignition system of automobile engines? how they eliminate sparking in ignition system 2) how they reduce voltage fluctuations in power supplies 3) how they are used in tuning radio circuits thanks in advance

friends, there is no charge inside a conductor or to put in a better way " why electric charge resides only on the outer surface of the conductor" thanks in advance

dear members, when a positive charge is given to a metal plate say A, negative charge is induced on the nearby plate B(say) due to electrostatic induction. the presence of negative charge reduces the potential of the plate which increases the capacitance of A by the relation c=q/v. my question...

i don't understand please clarify lucidly

folks, in higher secondary books i came across magnet's length that is bar magnet's length is given as " 2l" that is 2 multiplied by l. my question is " why the length is not referred as 'l' the usual way of referring length. please clarify in layman terms. thanks in advance logesh aravindan