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A power transmission line feeds input power at 2300 V to a stepdown transformer with its primary windings having 4000 turns. What should be the number of turns in the secondary in order to get output power at 230 V?

Answer»

Solution :Primary coil `RARR` 1
Secondary coil `rarr` 2
For ideal transformer, we have
`( epsilon_(1))/( epsilon_(2)) = ( N_(1))/( N_(2))`
`:. N_(2) = N_(1) ( epsilon_(2))/(epsilon_(1))`
`= ( 4000 ) ( 2130)/( 2300)`
`:. N_(2) = 400`


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