BY Pragyan Sharma Polavarapu TID BITS -1 Computer can do in just one second a million calculations like 2+3, 4x2, 5-3, 9/3 etc . This is because electric current makes the calculations. The speed of current is about 300,000 kilometres, yes,300,000 kilometres in just one second. There is an interesting fact. Whereas we get current in our homes (in India) at 220 volts, the currents which are used by computer/laptop/tab/cell phone are only like 2volts,3 volts,5 volts. (Voltage of flowing electric current is like depth of flowing water in a neat cement canal of uniform rectangular cross section). TID BITS-2 Only once or twice in a second we can operate the electric switches on the walls in rooms of our house. But inside the computer, the current is switched on/off a million times in just one second Silicon semiconductor molecules (atom sized particles) do such switching. The silicon chip in computer is o...