Home
Class 12
PHYSICS
Figure : Long distance power transmissio...


Figure : 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.
We need to step-up the voltage for power. transmission, so that:

A

The currentis reduced and consequently, the `I^(2)R` loss is cut down

B

The voltage is increased, the power losses are also increased

C

The power is increased before transmission is done

D

The voltage is decreased so `(V^(2))/(R)` losses.are reduced

Text Solution

Verified by Experts

The correct Answer is:
A
Step up transformer is required to increase the voltage so that the transmission current may decrease leading to a decrease in power loss due to Joule.s law of heating `I^(2)R`.
Promotional Banner

Topper's Solved these Questions

  • CBSE TERM-1 SAMPLE PAPER 1

    EDUCART PUBLICATION|Exercise SECTION-B|24 Videos

  • SAMPLE PAPER SELF-ASSESSMENT (11)

    EDUCART PUBLICATION|Exercise SECTION -C|1 Videos

  • SAMPLE PAPER - 8

    EDUCART PUBLICATION|Exercise Section C|6 Videos

Similar Questions

Explore conceptually related problems

Case study : Read the following paragraph and answers the questions : 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. We need to step-up the voltage for power transmission, so that

Long Distance Power Transmission

Case study : Read the following paragraph and answers the questions : 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. Which of the following statement is true?

Case study : Read the following paragraph and answers the questions : 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,

Case study : Read the following paragraph and answers the questions : 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

Over a long distance, of large distance and distribution of electrical energy is done by: