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A power transmission line feeds input po...

A power transmission line feeds input power at 2200 V to a step-down transformer with its primary windings having 3000 turns. Find the number of turns in the secondary to get the power output at 220 V.

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Given , `V_p=2200V,N_p=3000,V_s=220V`
`V_s/V_p=N_s/N_p`or,`N_s=(N_p.V_s)/V_p=(3000times220)/2200`
`therefore N_s=300`
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