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प्रश्न
Name the transformer used in the power transmitting station of a power plant.
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उत्तर
A step-up transformer is used in the power transmitting station of a power plant.
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संबंधित प्रश्न
Which coil of a step up transformer is made thicker and why?
Why is the core of a transformer laminated?
State two ways through which the strength of an electromagnet can be increased.
State two factors on which the magnitude of induced e.m.f. depend.
How are the e.m.f in the primary and secondary coils of a transformer related with the number of turns in these coils?
A transformer lowers e.m.f. from 220 V to 15 V. If 400 W power is given in primary, calculate (i) the current in primary coil and (ii) the current in secondary coil.
Give the advantage of AC in long distance power transmission with an illustration.
For an ideal step-down transformer, the quantity which is constant for both the coils is ______.
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.
A power transmission line feeds input power at 2300 V to a step down transformer with its primary windings having 4000 turns. The number of turns in the secondary in order to get output power at 230 V are ______.
A 60 W load is connected to the secondary of a transformer whose primary draws line voltage. If a current of 0.54 A flows in the load, what is the current in the primary coil? Comment on the type of transformer being used.
