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Does a basic transfomer in its normal operation use step up voltage step down voltage step up current or all?
Wiki User
∙ 13y ago
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.
Wiki User
∙ 13y ago
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Vacuum tube grid current changes in?
In normal operation there is no grid current, only a voltage.
What happens to voltage when a reactor limits current?
the currents path blocks & normal voltage will flow
How many directions does current flow through a diode?
A diode allows only current flow in one direction under normal operation. Exceed the operating voltage and it can break down allowing bi-directional flow.
What happens when magnitude of current or voltage become zero in alternating current fan?
It depends how long they are zero for. If for a minute or more the fan will stop. If they reach zero 100 or 120 times a second, as in normal operation, the fan will run normally.
About pn junction diode?
It is one of the least difficult Semiconductor Devices around, it has the normal for passing current in stand out heading just. On the other hand, it does not carry on straightly as for the connected voltage as the diode has an exponential current-voltage relationship and consequently we can not depicted its operation by basically utilizing a mathematical statement, for example, Ohm's law.
What component of a welding machine changes AC current to DC current?
Yes, it is normal for a welding machine to convert AC voltage to a DC voltage.
How diodes protect the circuit from back emf which is generated by relay coils?
The relay coil is an inductor and, as such, resists a change in current. When you de-energize the coil, it attempts to maintain the current flow, but it cannot because you have opened the circuit. This causes a high voltage spike to be developed across the coil which is of opposite polarity to the normal current. The diode conducts, dissipating the current and preventing the voltage from exceeding the safe operating voltage of the driving circuit, often a transistor. The Diode is wired so that it is in reverse during normal operation, so no current passes through the diode and does not affect the coil it is parallel connected to.
What is The operation of Current Transformer?
CT together with a ammeter is used to measure the current in high current or high voltage circuit, where a normal ammeter can not be connected in series in such high voltage or high current circuits. It is a secondary winding (like in transformer) wound on a single core primary wire and relative secondary current reperesnets the primary current. CT are also used protection purposes. Basic principle of CT i same either for metring or protection.
Is transfomer output voltage designed to full load?
Transformers are designed to run at specific voltage levels, and they are designed to handle a maximum load (known as "full load"); this load is usually based on the amount of current that can be pushed through the transformer without overheating, so if 1/2 voltage is applied, full load would be 1/2 of normal. Some "complicated" transformers may have other limitations (dual voltage transformers may have two different full loads specified, and they may not be directly proportional relative to voltage).
What happens to current flow when the resistance is higher than normal?
For a specific voltage, current flow is inversely proportional to resistance.
What happens if you use a fuse that's overrated for voltage but has the correct current rating?
Using a fuse correctly rated for current but "overrated" for voltage does not present a problem. Current ratings are critical safety issues, and fuses should be replaced with those of the same current rating. But using a fuse with an identical current rating but a higher voltage rating is not a problem. The reason for that lies in what the voltage rating of a fuse is. Fuses are given a voltage rating to state a maximum voltage in a circuit that they are designed to protect. And the voltage rating has nothing to do with the "normal" operation of the fuse. The fuse carries current when it operates normally, but when something happens and excessive current flows, the fusible link heats up and opens. This is where the voltage rating comes into play. It is possible that a fuse can arc through when it fails. It is the voltage rating that stands in the way of this. As long as the voltage rating of a circuit is not beyond the voltage rating of the fuse, that fuse will fail safely when it fails. It is acceptable to use a fuse of an equal current rating but a higher voltage rating when replacing a fuse that has failed.
What is the connection of normal wire star or delta?
normally delta connection wired in 3 phase induction motor. during starting wiring is in Star and after running normal speed changeover to delta .beacause starting time its phase voltage equals less root3 times of line voltage ,line current and phase current equals. in Delta phase voltage and line voltage equals, and phase current equals root3 times line current
