Almost everyone traveled by train and in few countries like India, it is the lifeline of long distance travel. You must saw that locomotive of the train is either diesel or electric. But do you know, one more type of locomotive is there which have both diesel and electric engine in it.
If you ever saw an electric rail engine, then you must observe that the engine takes power from the overhead wires with Pantograph. So the question arises, what is Pantograph?