Advertisements
Advertisements
प्रश्न
Name the transformer used in the power transmitting station of a power plant.
Advertisements
उत्तर
A step-up transformer is used in the power transmitting station of a power plant.
APPEARS IN
संबंधित प्रश्न
Why is the core of a transformer laminated?
State the principle of a step-up transformer. Explain, with the help of a labeled diagram, its working ?
Draw a labeled diagram of a full wave rectifier circuit. State its working principle. Show the input-output waveforms ?
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.
A transformer lowers e.m.f. 220 V to 12 volts. If the number of turns in primary are 8800, how many turns are in secondary coil?
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 ______.
Mention two main sources of power loss in real transformers.
How do the input and output powers in a transformer compare? State the assumption made.
