Question

It is said that: - energy is conserved. So in generator, if the friction is zero we get a continous supply of electricity. Here, input is nothing and the output is a continiuous supply of electricity which says " conservation of electricity is false" Or, there is some other phenomena involved in it. Define the phenomena with whole explanation

Answer 1

in case of a generator energy is conserved as when a generator works a mechanical work is being done on the generator after its working some work done is released as heat in sink and other appear as electrical energy.
in higher classes u will learn about Einstein s theory of relativity.acc to dat theory mass and energy are inter convertible.so we can't say that energy is conserved always.