When beavers dam a stream they slow the movement of water. Behind the beaver dam, a pond of still water is formed. This pond is then colonized by animals and plants that typically live in lakes rather than streams.
The turn and voltage ratio of a transformer can be simply expressed by the equation: Ns/Np = Vs/Vp; where N is the number of turns and V is the voltage.
Plugging in the given values, we have: 25 turns / 100 turns = Vs / 40 volts Vs = 40 volts (25 turns/100 turns) Vs = 10 volts