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A: By using PWM or magnetic amplifiers
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∙ 13y ago
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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).
What is the purpose of dc power?
theperpose of a power supply is to step up or step down an ac voltage to a desired dc value
What is the formula to step down dc voltage using resistors?
r=i/v
Can you step up or step down the DC voltage by a transformer?
You need alternating current for a transformer, for DC you would have to interrupt the power supply to make it effectively DC pulses.
Can a car stereo volume control be used to step down dc voltage?
nope
What is the difference between a step down chopper and a buck converter?
Choppers are dc - dc converters, on the basis of output voltage level step down chopper is used for output voltage less than input one. A buck converter is a step down chopper with a LC filter at the output end in order to reduce the voltage ripples.
What is the role of transformers in DC supplies?
the role of transforemers is to step down the ac voltage to desire value to be converted in dc
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!
What initiated the change into ac system from dc system?
The need for more and more power. In a fixed voltage system like DC, power is proportional to current, and current is related to conductor size. In order to have more power, you had to have larger conductors, and it was becoming unwieldy. With AC, we could use transformers to step up the voltage. Power is now proportional to both current and voltage, but current is still only related to conductor size, which means that with higher voltage, you could transfer more power with smaller conductors. Transformers would step up the voltage at the substation for transmission and distribution, while transformers on the poles would step it back down for small groups of services.
Why cant you step up dc voltage?
because it have no freqency
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.
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.
