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What is the voltage and amp service at the street before it steps down to the residence?
The voltage and ampacity can vary depending on the demand of the neighborhood. The voltage is typicaly 240 volt with the amperage capacity varying. Answer 7,200 volts goes to the transformer on the pole, amperage varies.
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The English Prime minister resides at No10 Downing Street (currently Gordon Brown Feb 2008) and his name is Gordon brown. One small problem with the above Gordon Brown is the… British Prime Minister & He's SCOTTISH ! Please refer to 'England ' as either GB or UK. England is part of the British Isles and part of the United Kingdom & although I am English, living in England, my Scots, Welsh & Irish compatriots do not enjoy being ignored............... The UK PM ... United Kingdom's or alternately Britain's Prime Minister lives there. It's referred to quite commonly there and in the US as "Number Ten Downing Street" ... the US equivalent would be "1600 Pennsylvania Avenue", for The White House. The incumbent Prime Minister.
Low frequency coils
Voltage is stepped up during transmission to reduce the power loss during transmission due to resistance. Power is a product of Voltage*Current, and losses due to resistance a…re directly proportional to the square of the current. Now when we increase the voltage , keeping the power constant, the subsequent current reduces.. thus in turn reducing the transmission losses.
You can make a voltage divider set of resistors and tap off the desired voltage. Some voltage regulators can be fed much higher voltages. The regulator will provide a constant… settable voltage with short circuit and overload protection. There are DC to DC converters. They first turn the DC into AC then rectify it and produce DC.
You need alternating current for a transformer, for DC you wouldhave to interrupt the power supply to make it effectively DCpulses.
step up or stepdown is done by the ratio of the number of turns in the primary / secondary coil, large number on high voltage side small number on low voltage side. the wire u…sed on the low voltage side would be thicker than the high.
In power applications it is a step down transformer. In a lower power application it might just be a circuit that converts AC to DC. A rheostat or potentiometer can also be us…ed, but can waste power.
In an ideal transformer, Power In = Power Out Example: The input voltage of 115vac @10amps is stepped up to 230vac, so what is the secondary current? 115 x 10 = 230 x I… I = 115 x 10/230 I = .5 x 10 = 5 amps The current is stepped down to 5 amps from 10 amps
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.
Should you use a transformer to step down the voltage before putting it in an electric coil because it will increase the current?
That does seem like a good idea at first, but it has one really major problem, and it can never be used: It's true, you want a large current in the coil, because that mak…es for a strong electromagnet. But the current in an electromagnet must be DC, and transformers only work with AC. (If the input to a transformer is DC, the output from it is smoke.) Answer A step-down transformer does not 'step up' current, as the question implies. The secondary current is determined by the load attached to the secondary winding. And, further to the first answer, electromagnets (if that's what the load is) work on both a.c. and d.c.
As transformers do not work with DC., the answer is a voltagedivider network (step down) or a voltage multiplier network (stepup).
The metaphor of stepping down is that you are going to a lower level of voltage. So no, a step down transformer does not increase voltage, it decreases it.
The voltage induced into the secondary winding will be lower than the voltage applied to the primary winding. The primary winding being the winding connected to the supply, …while the secondary winding is the one connected to the load.
The terms, 'step down' and 'step up', are applied to transformers.Transformers whose secondary (output) voltage is lower than theirprimary (input) voltage are termed 'step dow…n' transformers; thosewhose secondary voltage is greater than their primary voltage aretermed 'step up' transformers.
The current is automatically stepped up or down when the voltge isstepped down or up by a transformer. Most transformers are designed for a constant voltage, and thecurrent va…ries depending on the load. Current transformers are alsomade to detect the current in a power cable so that it can bemeasured. 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 currentis determined by the load. If there is no load, then there is nosecondary current; if there is a heavy load, then there will be aheavy secondary current. The secondary current then determines the primary current, becausethe 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-voltagesupplies and are designed to step the voltage up or down, and thecurrent is incidentally stepped down or up in the same ratio as thevoltage. Current transformers are designed to step current up or down(usually down), and are used most commonly to sample the current inpower conductors.