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What happen to voltage when a transformer is stepped up and stepped down?
Wiki User
∙ 13y ago
A step up transformer increases the applied voltage. A step down transformer decreases or lowers the applied voltage.
An example of step up Transformers are the transformers (known as fly-backs) in old CRTs that stepped up voltage from 110 Volts to 25,000 volts.
An example of step down transformers are the power bricks for laptops or any power adapter that step down the voltage from 110 volts to 12 volts, 9 volts or whatever is needed for your device. I must add that most (not all) power adapters also convert AC to DC.
Wiki User
∙ 13y ago
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A voltage that has been stepped down is measured across the output terminals of a?
transformer
What is the function of step-down transformers?
The function of any transformer is to change one AC voltage value to another AC voltage value. A step down transformer will transform a higher AC voltage to a lower AC voltage. A step up transformer will transform a lower AC voltage to a higher AC voltage. The transmission of electrical power uses both of these types of Transformers. From the generation station the voltage is stepped up to a very high transmission voltage and at the end of the transmission line it is stepped down to a voltage that consumers can utilize.
Is tranformer used to increase or decrease AC voltage?
The function of any transformer is to change one AC voltage value to another AC voltage value. A step down transformer will transform a higher AC voltage to a lower AC voltage. A step up transformer will transform a lower AC voltage to a higher AC voltage. The transmission of electrical power uses both of these types of transformers. From the generation station the voltage is stepped up to a very high transmission voltage and at the end of the transmission line it is stepped down to a voltage that consumers can utilize.
What happens to the current if the potential difference is stepped-up in an ideal transformer?
In an ideal transformer, if the voltage is stepped up by a factor of x, then the current is stepped down by a factor of x. The end result is that the power, P=VI, is not changed. Again, this is in the ideal case.
What happens when current travels through the second transformer before entering your home?
The voltage is stepped down to 240VAC from 7200VAC
Advantages of ac generators over dc genrators?
The output of an AC generator can be stepped up with a transformer. The high voltage can be more easily transferred over longer distances with higher gauge wire. At the destination, the high voltage can then be stepped back down with another transformer.
What value for a transformer determines the amount of voltage that is stepped up or down?
For an ideal transformer, the voltage ratio is exactly the same as its turns ratio. So if, for example, there are twice as many turns on the secondary winding as there are on the primary winding, then the secondary voltage will be twice that of the primary and the transformer will be a 'step up' type.
What happen if the secondary side of step down transformer supply a bigger voltage?
it would be called a step up transformer
What will happen to frequency of current when voltage is changed using a step up or step down transformer?
Frequency does not change when you use a step-up or step-down transformer. Only current and voltage is changed.
When is a step up transformer used in relationship as to when a step down transformer is used?
If the voltage needs to be increased from a lower voltage to a higher voltage a step up transformer is used. If the voltage needs to be lowered from a higher voltage to a lower voltage a step down transformer is used.
Where might a step-down transformer be used?
Step-down transformer is used at grid substations for feeding various substations which further step down the voltage for feeding distributing transformers and further step down transformers are used to supply the voltage for the consumer uses
Why do you obtain more dc voltage than ac voltage in power supply design by using transformer?
You don't. Transformers only work with AC voltage. Their input will be an AC waveform, and their output will be an AC waveform. Other electronics are used to convert the stepped down AC waveform from the transformer to DC.
