What is the need of banking a circular road?

What is the need for modulation ?

What is the need for modulation ?

What is the need of measurement?

A train runs along an unbanked circular track of radius 30 m at a speed of 54 km//h . The mass of the train is 10^6 kg . What provides the centripetal force required for this purpose — Hie engine or the rails ? What is the angle of banking required to prevent wearing out of the rail ?

What is the need of combining different resistors? What is the resultant resistance when number of resistances are connected in series?

What is the need for vectors?