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Electricity or power has become the major part of our daily life and without electricity we cannot imagine a life today. Most of our household appliances work on electric current. We face various power problems due to voltage fluctuations. Sometimes our home appliances malfunction due to voltage problems. The solution for all these problems can be rectified only through a transformer. Power transformers or a transformer is an electrical device that is used to change an alternating Current Voltage from one electric circuit to another through electromagnetic induction. These transformers are employed in various mechanisms to reduce the incoming voltage or increasing the voltage of electrical equipments. These transformers have two or more windings wounded on a laminated iron core and the number of windings is based on the requirement of electric voltage that the transformer is used to supply.
There are many types of transformers like isolation transformer, power transformers, electrical transformer, audio transformer, current transformer, high voltage and low voltage transformers, step-up and step-down transformers etc. Each of these kinds has their own properties and usages in transferring voltage based on the appliance it is attached with.
Electric transformer is a device that is employed in increasing or lowering the voltage of alternating current or voltage. Electric transformers have two sets of coils called primary and secondary coils linked around magnetic fields that work as conductors. This number of windings determines the workability of the transformer. There are various forms of electrical transformers like step up transformers to raise voltage or step-down transformer to lower voltage levels that can be used in power lines or household appliances to regulate current supply and reduce electricity bill costs.
Current transformers are used to get secondary or additional current to produce current from the transformer and this helps the customers to get ample current for their various applications like metering and protective relaying in electrical power industry to get safe measurement of large currents even from high voltages. Audio transformers are designed with epoxy resin that facilitates improvements in sound qualities by removing disturbing audio signals that is sourced from other devices. Flyback transformers can convert the input voltage and current to the expected output voltage and current and these transformers are available in variety of models and sizes.
Electrical switches are the electrical components that are used to stop the electricity flow by interrupting the current or diverting it from one conductor to another. These electrical switches are available for medium current, low current and high current appliances. Circuit breaker is an electrical switch that operates automatically to cut off or break a circuit from causing damage due to high voltage. This is vitally employed in detecting the fault in the circuit mechanism and cut the electrical flow to avoid repair of the appliance. These circuit breakers are of different types like vacuum circuit breakers, SF6 circuit breakers, fixes mounted circuit breakers, etc.
There are various tips that we have to consider in selecting the best transformer from the most excellent companies to enjoy trouble free and secured electrical services. The greater protection of these power transformers can be confirmed if they own the TVSS surge protection. The surge protectors are devices that guarantee safety of electrical appliances from voltage spikes by regulating the current that is supplied to the appliance. The voltage is maintained either by obstructing or reducing the ground voltages to a safer measure. Most of the power transformers that are available today have built-in surge protection to offer high quality devices to the customers.
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Current, Voltage and Resistance?
I'm trying to make sure I fully understand their relationships.
In a parallel section of a combined circuit - in a higher resistance, current will decrease, voltage will increase? yes? no?
thanks
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Energy...Current...Voltage and Time.........?
can someone tell me how to change these formulas to make each subject?
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Current/Voltage Graphs...?
How do current - Potential Difference graphs show resistance.
Could you explain by the gradient.
Eg the higher the gradient of the graph - higher/lower resistance
The lower the gradient of the graph - higher/lower resistance
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Questions about circuits?
Okay, hopefully someone can help sort out my confusion and frustration with some electromagnetic stuff. Please answer any part of any question if you can.
(1) when considering a circuit with two batteries and two resistors, why is it that we have the batteries' positive terminals "face" each other? In my book it goes like this:
(-l|l|+)=>=(resistor)=>=(+|l|l-)=>=(resistor)=>
(only of course the two ends are connected, since this is a circuit).
Doesn't the current flow from negative to positive terminal? and wouldn't it make more sense to connect the circuit this way:
(-l|l|+)=>=(resistor)=>=(-l|l|+)=>=(resistor)=>
i.e., positive and negative facing?
(2) Here is a question from my book that I don't know how to answer: "A circuit consists of two batteries, a resistor and a a capacitor, all in a series. Does the description allow any flexibility?" I have read the text very carefully while taking notes, and there is literally nothing that prepares to answer this question AT ALL, which is extremely frustrating because I am trying to understand. I can calculate various quantities like the current, voltage and resistance across and through various components in various circuits, but I don't understand why they are connected as they are, and why they can or cannot be connected in other ways. For example, does a resistor always separate a battery from a capacitor? Why or why not?
(3) This brings me to an even more fundamental question, which is why we need resistors at all? Don't they lower the power we can get from a given source? In my book it is never stated that a circuit with emf couldn't exist without a resistor, yet they never show one. Is this to do with the phrase "short circuit," which my book defines as "a circuit with 0 resistance." What is so bad about that?
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how to coil the nichrome wire? how will i know the other details(current, voltage, etc) of it? all i know is t?
my design is to heat the nichrome wire, our source is Solar Panel --> Charge Controller --> Car Battery(12V) --> Nichrome Wire
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What is charge & current?
When I sat to do study chapter related current & voltage. Then I faced a problem. I'm not understanding charge & current. What is the relation between them? If you can, please help me. I'm waiting for it.
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How to control the moment of a DC motor?
I have a board that can regulate the numbers of revolutions through a change of voltage between 0-5 V using a pulse width modulation. But instead of regulating the revolutions i would like to regulate the moment, which isn't measurable as easy. I can measure current, voltage, revolutions (and time therefor all time steps) eventually the pulse width. So basically the questions is whats the proportionality between voltage and moment (or how is it possible to predict the moment by regulating the voltage)?
The motor is supplied with 12 V and 0.7 A (in case someone needs this info)
thx
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