What are step up and step down transformers???????????

Question

can you explain briefly and simply i dont understand. and why are they used. plzzzzzzzzzzzzzzzzzzzz provide an example so i can follow it and understand.

thanks alot

Answer 1

Trans formers are used to step up or step down the voltage of an electrical system/

The television in your home gets supply from a wall plug. But the different parts in the T.V.needs different voltages. So a transformer is used to step down the voltage to different parts as required.

In power generating stations, we generate say 11000volt,

Now the power needed to be transmitted long distances, If we transmit the same voltage, it is not efficient.Also we need more thick copper wires.So we step up the voltage to 220,000volt or 440,000volt etc. This increases the efficiency,reduces the loss in transmission.

At the end of line near the consumer,the voltage is again stepped down for the needs

Answer 2

step-up transformers are the one which are used to increase the voltage.They are represented as 220v/22kv.

where as step-down are the one which are used to decrease the voltage 22kv/220v.

murthy

Answer 3

A step-up transformer increases voltage.

A step-down transformer decreases voltage.

They are used to manipulate voltage.

Answer 4

Transformers change voltage, and are used when someone wishes to connect a lower- or higher-powered device to an electrical circuit.  One common example is a cell phone, which uses something other than 120 volts (in the USA.)  These transformers are housed in a "wall brick" with a separate device called a rectifier, which changes AC (alternating current, supplied by utilities) to DC (direct current, also supplied by batteries).

Step-down transformers, then, lower voltage, and of course step-up transformers raise it.

Simple transformers are made by coiling copper wire around a U-shaped piece of metal.  You may coil, for example, 100 wraps on one side of the U, and ten on the other.  This would give you a ratio of 10:1 and would transform the supplied voltage to something ten times weaker, say from 120V to 12V, or 240V to 24V.