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प्रश्न
What type of current is transmitted from the power station?
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उत्तर
An alternating current is transmitted from the power station.
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संबंधित प्रश्न
Name the transformer used in the power transmitting station of a power plant.
On which type of current do transformers work?
Name two kind of energy loss in a transformer. How is it minimized?
Describe briefly, with the help of labelled diagram, working of a step-up transformer.
A step-up transformer converts a low voltage into high voltage. Does it not violate the principle of conservation of energy? Explain.
What is the ideal transformer?
Describe the construction and working of a transformer with a neat labelled diagram.
A transformer having efficiency of 80% is working on 200 V and 6 kW power supply. If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are ____________.
Read the following paragraph and answer the question:
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.
If the secondary coil has a greater number of turns than the primary, ______.
Explain why core of a transformer is always laminated.
