Question

A power transmission line feeds input power at 2300 V to a step down trnasformer with it primary windings having 4000 turns. What should be the number of turns in the seconday windings in order to get output power at 230 V?

Answer 1

Given Primary voltage `V_(P)=2300 V`
Secondary voltage `V_(S)=230 V`.
Using formula,
`(V_(S))/(V_(P))=(N_(S))/(N_(P))`
`(230)/(2300)=(N_(S))/(4000)`
`N_(S)=400`
`therefore` thus, the number of turns in secondary are 400.