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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.
Which of the following statement is true?

A

Energy is created when a transformer steps up the voltage

B

A transformer is designed to convert an AC voltage to DC voltage

C

Step-up transformer increases the power for transmission

D

tep-down transformer decreases the AC voltage

Text Solution

Verified by Experts

The correct Answer is:
D
A transformer steps up (increases) or steps down (decreases) the AC voltage.
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