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Indeed yes. The magnetic core material does have some energy losses associated with its operation. These are known as hysteresis losses, and show up as the magnetic device (transformer, solenoid) becoming warm.
A transformer itself, merely reflects to its primary winding the conditions of the secondary winding. Their resistive losses, their phase change and so on.
What else can I help you with?
Power loss in open circuit test?
There is no power loss in open circuit test. Actually there is iron loss also known as magnetic losses. These include hysteresis and eddy-current losses. This can be described as V1^2/Rc Where V1 is the primary voltage and Rc is the resistance of the magnetic core.
Does an ideal inductor does not dissipate any energy it stores energy in the form of a magnetic field?
yes
What is a transformer and what principle is used in transformer?
A transformer is a static device which converts electrical energy from one circuit to another circuit without changing frequency, power, power factor. It works on the principle of faradays laws of electro magnetic induction.
What is the lifespan of a resistor?
A resistor doesn't deteriorate with age, and has no particular 'life-span', as long as it's used properly. -- A resistor in a box on the shelf, or in a circuit where it stays cool, will last indefinitely. -- A resistor in a circuit where it's forced to dissipate enough power to make it hot may change its resistance value permanently, but will continue to operate. -- A resistor in a circuit where it's forced to dissipate even more than that, to a ridiculous extreme, may melt or explode. When that happens, it's the end of the resistor's life-span. But it wasn't the resistor's fault.
Is it need iron core in dc generator?
If, by 'core', you mean its magnetic circuit, the answer is yes you do! Without a magnetic circuit, you will not be able to concentrate the magnetic flux within the air gaps enough to produce sufficient torque on the rotor windings.
How is a series circuit and a parallel circuit alike?
Both take current and energy from the power supply and dissipate power.
What is difference between magnetic circuit and electric circuit?
magnetic circit has a magnet and electri circuit has electricity
Can a fixed resistor be used as a dimmer in a lighting circuit and if no what can be?
No. A fixed resistor cannot be used as a dimmer in a lighting circuit. Depending on the dimming setting, you would need to dissipate substantial power across the resistor. What you need instead is some kind of pulse width modulated device, such as an SCR or TRIAC, or switching power supply, that does not dissipate a lot of power when it is turned on, because it operates in saturated mode, but the average power delivered to the load is what you want it to be.
What is the var meter?
A VAR Meter is used to measure Reactive Power in AC Circuits - Pure reactive components dissipate zero power, which makes sense in a DC circuit, as a capacitor passes no DC current and an inductor displaces no voltage. Yet, in an AC circuit, the reactive components "seem" to dissipate power, as current passes through the capacitor and the inductor sees a voltage drop. This counterfeit power is called "reactive power" and is measured not in Watts, but in VARs (Volt-Amps-Reactive). Its mathematical formula symbol is "Q". A VAR Meter is used to measure Reactive Power in AC Circuits - Pure reactive components dissipate zero power, which makes sense in a DC circuit, as a capacitor passes no DC current and an inductor displaces no voltage. Yet, in an AC circuit, the reactive components "seem" to dissipate power, as current passes through the capacitor and the inductor sees a voltage drop. This counterfeit power is called "reactive power" and is measured not in Watts, but in VARs (Volt-Amps-Reactive). Its mathematical formula symbol is "Q".
Power loss in open circuit test?
There is no power loss in open circuit test. Actually there is iron loss also known as magnetic losses. These include hysteresis and eddy-current losses. This can be described as V1^2/Rc Where V1 is the primary voltage and Rc is the resistance of the magnetic core.
What describes resistance to movement to magnetic lines of force?
Resistance to movement of magnetic lines of force is described as reluctance. Reluctance is similar to resistance in an electric circuit and is a measure of the opposition that a magnetic circuit offers to the magnetic flux. It depends on the material and the geometry of the magnetic circuit.
Application of electrical circuit analogies in magnetic circuit?
Magnetic circuit follows equation (4) that is Ni = (Ф) ( l / μA) or m.m.f(magneto motive force) = (Flux) (reluctance).Electric circuit follows ohm's law that is E = I.R or e.m.f(electro motive force) = (current) (Resistance)From above point m.m.f in magnetic circuit is like as e.m.f in electrical circuit.Flux in magnetic circuit is similar as current in electrical circuit.Reluctance in magnetic circuit, S = ( l / μA) is similar to resistance R = (ρl/A) in electric circuit.Permeance (= 1/reluctance) in magnetic circuit is equivalent to conductance (=1/resistance) in electric circuit.In magnetic circuit flux establishes but not flow like as current in magnetic circuit.In magnetic circuit energy needed only to establish the flux but no consistent energy need to maintain it whereas in electric circuit continuous energy needed to flow of current.Resistance of an electric circuit is constant (for same temperature) and is independent of current but reluctance of magnetic circuit is not constant because it depends on μ (=B/H) which is not constant and depends on B/H.
What is the importance of air gap in magnetic circuit?
The air gap in a magnetic circuit is important because it increases the reluctance of the circuit, which in turn influences the magnetic flux and magnetic field strength. By controlling the size of the air gap, we can control the level of magnetic flux and magnetic force produced in the circuit. This can be useful in applications where precise control over magnetic properties is required.
Is a circuit a path made for magnetic field?
A circuit is a path for charge particles -- it conducts current. An inductor, a circuit component, generates a magnetic field, when an AC is on. ======================
What flux that does not follow the intended path in a magnetic circuit?
Leakage flux is the flux that does not follow the intended path in a magnetic circuit. It represents the magnetic field that strays outside of the core and does not contribute to the desired magnetic coupling between the components of the circuit. Strategies such as improving the design and materials of the magnetic circuit can help minimize leakage flux.
Is the magnetic field that is near an electrical circuit parallel or perpendicular to the circuit?
Perpendicular to the circuit.
Why does the short-circuit test essentially show only PR losses and not excitation losses in a transfonner?
Because a short-circuit test is done at low voltage so there is very small power loss in the magnetic core. That is because there is very magnetic flux.
