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प्रश्न
State the mathematical relation between a number of turns in the primary coil to a secondary coil in the step-up transformer.
उत्तर
In a step-up transformer, the number of turns in the secondary coil is more than that in the primary coil (NS > NP).
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संबंधित प्रश्न
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Derive an expression for ratio of e.m.f.s and currents in terms of number of turns in primary and secondary coil.
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(b) Name and state the law which explains the above observations.
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State the underlying principle of a transformer. How is the large scale transmission of electric energy over long distances done with the use of transformers?
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Transformer works on ______.
State whether true or false. If false, correct the statement.
A transformer can step up direct current.
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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?
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Long distance power transmissions
The large-scale transmission and distribution of electrical energy over long distances is done with the use of transformers. The voltage output of the generator is stepped up. It is then transmitted over long distances to an area sub-station near the consumers. There the voltage is stepped down. It is further stepped down at distributing sub-stations and utility poles before a power supply of 240 V reaches our homes.
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An iron rod of 0.2 cm2 cross-sectional area is subjected to a magnetising field of 1200 Am-1. If the susceptibility of iron is 599, then the magnetic flux produced is ______.
The primary coil having NP turns of an ideal transformer is supplied with an alternating voltage VP. Obtain an expression for the voltage VS induced in its secondary coil having NS turns.
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