A car moving at 20m/s with its horn blowing (f = 1200Hz) is chasing another car going at 15m/s. What is the apparent frequency of the horn as heard by the driver being chased?

Any line or section taken through an advancing wave in which all the particles are in the same phase is called the

In which of the points labelled A, B, C, D and E on the conductor shown would electric charge tend to concentrate most

The point at which the molecules of a loaded wire begin to slide across each other resulting in a rapid increase in extension is

The resultant capacitance in the figure above is