Class 12th Physics 2017 Set2 Delhi Board Paper Solution
A power transmission line feeds input power at 2200V to a step-down transformer with its primary windings having 3000 turns. Find the number of turns in the secondary winding to get the power output at 220 V.
Given, input power (Vp ) = 2200V
Number of turns (n1) = 3000
Output power (Vs) = 220 V
⇒ 300
∴ Number of turns in the secondary winding, n2 = 300 turns.
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