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The current is automatically stepped up or down when the voltge is stepped down or up by a transformer.
Most Transformers are designed for a constant voltage, and the current varies depending on the load. Current transformers are also made to detect the current in a power cable so that it can be measured.
Another Answer
It's a misconception that transformers step current up or down (with the exception of current transformers, that is!). Transformers step voltages up or down. The secondary current is determined by the load. If there is no load, then there is no secondary current; if there is a heavy load, then there will be a heavy secondary current.
The secondary current then determines the primary current, because the primary power must match the secondary power (ignoring losses), so if the secondary current increases, so must the primary current. The current itself isn't stepped up or down.
<<>> Normal transformers work with constant-voltage supplies and are designed to step the voltage up or down, and the current is incidentally stepped down or up in the same ratio as the voltage.
Current transformers are designed to step current up or down (usually down), and are used most commonly to sample the current in power conductors.
Wiki User
∙ 9y ago
Wiki User
∙ 13y agoThis will depend on what your application is. If your goal is to step down voltage, then you can use a transformer. If your goal is to increase output power (...by stepping up the current...), then you would use a power amplifier.
If you are trying to amplify a small signal, such as a microphone output, you would need a voltage amplifier (also called a preamplifier) to increase the typical 5-50microvolt microphone output to a reasonable .5-20 volt output signal. If you wished to drive a speaker with this, you would likely need a power amplifier stage after this as well, since voltage amplifer outputs are typically fairly high resistance. A power amplifier has a high input resistance, and a low output resistance. this allows it to supply significant current without loading the previous stage (the voltage amplifier).
Wiki User
∙ 15y agoYou can step up amps with a step-down transformer, but you will lose volts.
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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.
Why is a transformer used?
To step up or step down a particular voltage using the principle of electromagnetic induction. This is a potential transformer. Transformers are also used to step up or step down current. Current transformers are used extensively in instrumentation applications. Current and voltage are inversely proportional.
Which part of the process of distributing electricity changes the voltage of the current?
The transformers step-up and down voltage for transmission and use.
What does a step-up transformer step up?
A step-up transformer steps up the voltage rather than stepping down the voltage like a normal ac wall adapter does. By stepping up the voltage it is not free electricity it allspice takes away from the available amps.e.g.Say you have 12V 1A AC going in to the primary coil of your step up transformer, this would result in a higher voltage and lesser amps like 24V 0.5A AC coming out of the secondary coil.AnswerA step-up transformer steps up voltage, but it DOES NOT 'step down' current! The secondary current is determined by the load, and the primary current is then determined by the value of secondary current.
What are transformers designed to operate with?
to step up voltage or to step down voltage
Can one step up power from inverter with step-up transformer?
No. You can not step up power with a transformer. You can step up voltage, while stepping down current, or you can step up current, while stepping down voltage, but you cannot step up (or down) power.
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.
Why is a transformer used?
To step up or step down a particular voltage using the principle of electromagnetic induction. This is a potential transformer. Transformers are also used to step up or step down current. Current transformers are used extensively in instrumentation applications. Current and voltage are inversely proportional.
A transformer can only the voltage of an alternating current?
A transformer can only increase or decrease the voltage of an alternating current, and it is called step-up transformer or step-down transformer accordingly.
Does a basic transfomer in its normal operation use step up voltage step down voltage step up current or all?
A transformer has a primary and a secondary side. There is a ratio of windings from one side to the other that dictates whether it is a step up or step down transformer. The transformer is usually marked as to the input and output specifications. The current is directly proportional to voltage. If you had a transformer that was a step up from primary to secondary, it would be step down from secondary to primary.
How are step up and step down transformations used in transmission of electric current from electric company to homes?
(This is what my teacher said, I wrote this down in my notes) The answer is, Step-up Transformers are used to increase the voltage of an electric current before it is sent out over transmission lines from the electric company. Step-down transformers are used to reduce the voltage of current from high-voltage transmission lines before it enters homes and businesses. Some devices, such as televisions, contain step-up transformers that increase the voltage once again.
How are step-up and step-down transformers used in the transmission of electric current from the electric company to homes?
(This is what my teacher said, I wrote this down in my notes) The answer is, Step-up transformers are used to increase the voltage of an electric current before it is sent out over transmission lines from the electric company. Step-down transformers are used to reduce the voltage of current from high-voltage transmission lines before it enters homes and businesses. Some devices, such as televisions, contain step-up transformers that increase the voltage once again.
Which part of the process of distributing electricity changes the voltage of the current?
The transformers step-up and down voltage for transmission and use.
What does a step-up transformer step up?
A step-up transformer steps up the voltage rather than stepping down the voltage like a normal ac wall adapter does. By stepping up the voltage it is not free electricity it allspice takes away from the available amps.e.g.Say you have 12V 1A AC going in to the primary coil of your step up transformer, this would result in a higher voltage and lesser amps like 24V 0.5A AC coming out of the secondary coil.AnswerA step-up transformer steps up voltage, but it DOES NOT 'step down' current! The secondary current is determined by the load, and the primary current is then determined by the value of secondary current.
Where are transforers used?
Most electrical transformers are used to step up or step down the voltage of alternating electrical current.
What device increases or decreases the volt- age of alternating current?
A transformer can step up or step down AC voltage
What is transform function?
To stop up or step down the voltage
