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You need alternating current for a transformer, for DC you would have to interrupt the power supply to make it effectively DC pulses.
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Device used to step voltage up or down?
As transformers do not work with DC., the answer is a voltage divider network (step down) or a voltage multiplier network (step up).
If a dc voltage of 12v is added to the secondary of step down transformer and rating of transformer is 220 input and 12v output what will be the result from primary of transformer?
A DC voltage added to one side of a transformer has no effect on the other side.
Why transformers are not excited with dc?
by using step-up transformer we can change the voltage in higher level
Do transformer works on pulsating dc?
If the input is pulsating DC, then the output will be pulsating DC. It will not be shaped the same, but it will be close, depending on the frequency and rise and fall time in comparison with the inductive reactance of the transformer.
Can 12v DC change 250v ac?
Definitely not it could be dangerous. AC and DC can't be interchanged in general.
Device used to step voltage up or down?
As transformers do not work with DC., the answer is a voltage divider network (step down) or a voltage multiplier network (step up).
If a dc voltage of 12v is added to the secondary of step down transformer and rating of transformer is 220 input and 12v output what will be the result from primary of transformer?
A DC voltage added to one side of a transformer has no effect on the other side.
Why ac current is used in a transformer?
AC current or DC current can be used in transformers. A transformer is made of two coils of wire, the input coil induces a current into the output coil. Transformers change the voltage either up (step up transformer) or down (step down transformer). The amount of change in voltage is dependent solely on the number of windings in both coils in the transformer. DC transformers work exactly the same way AC transformers do.
Can dc current work on transformer?
Transformer is by definition can transform only AC current. But it's possible to build device that can step up or step down DC voltage directly. These are called DC-DC converters not transformers.
Why transformers are not excited with dc?
by using step-up transformer we can change the voltage in higher level
The difference between a transfer and a rectifier?
A transformer is basically used to step up or step down the main power supply. The rectifier is used to convert an alternating current (AC) or voltage to direct current (DC) or voltage.
What happen to voltage when a transformer is stepped up and stepped down?
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.
Why do you use alternating currents?
because there is no transformer to step up or step down the dc voltage,and in the world most of the components are manufactured in the usage of ac only , that is the reasoning for usage of alternating current
Do transformer works on pulsating dc?
If the input is pulsating DC, then the output will be pulsating DC. It will not be shaped the same, but it will be close, depending on the frequency and rise and fall time in comparison with the inductive reactance of the transformer.
Can 12v DC change 250v ac?
Definitely not it could be dangerous. AC and DC can't be interchanged in general.
A transformer cannot do A. step up or step down a steady dc voltage b. step down ac voltage c couple power from primary to secondary d step up ac voltage?
This is obviously a test or homework question. If we simply answer it for you, you will learn nothing. Please find the answer by studying your course textbook. You may not think so, but we just did you a favor!
Can a Diode be used on a battery charger?
ya. we are using diode in a battery charger to convert ac into dc. 230v dc is step down by using step down transformer
