What type of current is produced by an electric generator?
(a) Name three types of substances in which an electric current can produce a chemical effect. (b) State some of the characteristics of chemical changes brought about by the chemical effect of electric current. (c) Why does an electric bulb glow when a current passes through it ?
Electric current is produced by the flow of
Name the type of electric current generated by most of the power stations in our country. Why is it preferred over the other type of electric current? What is the frequency of power supply generated in India?