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A power transmission line feeds input po...

A power transmission line feeds input power at 2400V to a step-down transformer and which delivers power at 240V with its primary windings having 5000 turns . If the current in the primary coil of the transformer is 5A and its efficiency is 80%, then what is the output current (in A)?

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A power transmission line feeds input power at 2300 V a step down transformer with its primary windings having 4000 turns. The output power is delivered at 230 V by the transformer. If the current in the primary of the transformer is 5A and its efficiency is 90% , the output current would be :

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The current in the primary coil of a transformer (assuming no power loss) as shown in fig. will be –

(a) Draw a labelled diagram of a step-up transformer. Obtain the ratio of secondary to primary voltage in terms of number of turns and currents in the two coils. (b) 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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