0
From what I've read, an inductor is designed to store energy in the form of a magnetic flux. A simple inductor can be thought of as a coil of wires around a medium. The current causes the flux to go through each turn of the coil. Further examination and Faraday's law leads to this model.
v= N * D(magnetic flux)
Because the current inside the coil is what generates the flux, the voltage will change first, before the flowing electrons will get all the way through the inductor.
The inductance constant L is the Number of turns in the wire times the ratio of the current i to the magnetic flux, which is usually a constant.
L = N*flux/i
Which leads to this relationship between voltage and current in an inductor:
v = L* D(i)
The D() function being a derivative. Because the derivative of the current will change before the current actually does, voltage leads current in an inductor.
What else can I help you with?
Is there no induced voltage in an inductor unless the current is changing?
In an ideal inductor, no, there is no voltage induced across an inductor unless the current in the inductor is changing. However, since there are no ideal inductors nor power supplies, eventually an inductor will draw a constant current, i.e. the limit of the power supply; and, since no inductor has zero ohms at equilibrium, that current will translate to voltage.
What does the voltage across a inductor do?
voltage across inductor create a flux. because of variation current developes an opposite emf.
What is the maximum inductor voltage when the inductor current is decreasing?
depending on the stray capacitance it can be from a few ten volts to a few kilo volts.
Why alternating current induce voltage across an inductor?
due to change in flux
What happens when current flows through inductor?
When current flows through an inductor, a magnetic field is created. That's the simple explanation. More formally, an inductor is a magnetic device that reactively resists a change in current by presenting a voltage backwards towards the source. The equation for an inductor is ... di/dt = v/L ... which means the the rate of change in current in amperes per second is proportional to voltage in volts and inversely proportional to inductance in henrys. Theoretically, this means that, if you place a constant voltage across an inductor, current will linearly increase without bounds to infinity. Practically, this will be limited by resistance and current capacity.
What cause the voltage t lead current in an ac circuit?
Voltage leads current or, more specifically current lags voltage, in an inductive circuit. This is because an inductor resists a change in current.
Is there no induced voltage in an inductor unless the current is changing?
In an ideal inductor, no, there is no voltage induced across an inductor unless the current in the inductor is changing. However, since there are no ideal inductors nor power supplies, eventually an inductor will draw a constant current, i.e. the limit of the power supply; and, since no inductor has zero ohms at equilibrium, that current will translate to voltage.
Why voltage leads current in a inductor?
Eli the ice man. Voltage (E) before Current (I) in a coil (inductor)(L) Current (I) before Voltage (E) in a Cap. (C) Got it?
What does the voltage across a inductor do?
voltage across inductor create a flux. because of variation current developes an opposite emf.
What is the effect on Il as the load current IL increases?
As the load current ( I_L ) increases, the inductor current ( I_L ) in a circuit will also increase, assuming the inductor is connected in a circuit where it actively supports the load. This increase in current can lead to a rise in the voltage across the inductor due to its inductive properties. If the load current exceeds the inductor's rated capacity, it can lead to saturation or overheating, potentially damaging the inductor or affecting overall circuit performance. Additionally, increased load current may lead to higher losses due to increased resistance in the circuit.
What is the maximum inductor voltage when the inductor current is decreasing?
depending on the stray capacitance it can be from a few ten volts to a few kilo volts.
How can current lag or lead voltage in an AC circuit isn't current a function of voltage etc?
Current can lag or lead voltage in an AC circuit when the load is what we call reactive. The idea that current is purely a function of voltage only applies when working with DC, or when working with purely resistive loads, such as light bulbs and toasters. Not so, when dealing with motors and power supplies. What happens is that an inductor resists a change in current. That means that, given a particular voltage and current at a particular instant of time, if you change the voltage, the current will not immediately follow - it will lag - because the inductor is a stored energy device. Similarly, a capacitor resists a change in voltage, which means that if you change the current, the voltage will not immediately follow - it will lag - also because the capacitor is a stored energy device. Flip over current and voltage in the analysis of a capacitor, and you find that the current will lead the voltage, as opposed to the inductor's current lagging the voltage. This causes the phenomenon of power factor, which is basically the cosine of the phase angle between voltage and current. Power factor is the ratio of apparent power to true power.
What is the bahaviorS of the INDUCTOR in ac supply?
Because of Ac supply, current lags voltage by 90 in Inductor.
Inductor works in direct current?
Yes, an inductor works with direct current. It is called an electromagnet. Of course, a practical electromagnet has series resistance, otherwise the current in the inductor would increase to the limit of the current/voltage source.
When you disconnect a small voltage battery from a coil of many loops of wire and a large voltage is produced by what?
Disconnecting a small voltage source from a coil (inductor) causes a larger, often a much larger, reverse voltage spike due to the collapse of the magnetic field in the inductor coupled with the sudden absence of a current path to dissipate the electromagnetic energy. An inductor resists a change in current. The equation for an inductor is ... di/dt = V/L ... which means that the rate of change of current is proportional to voltage and inversely proportional to inductance. If you have a current established in an inductor, and then suddenly open the circuit, the inductor will attempt to maintain that current. It can't, however, because the circuit is open, having large resistance. By ohm's law, voltage is resistance times current. If you keep current constant, and make resistance large, then voltage has to also be large. In the theoretical case of an ideal inductor in an ideal circuit, the voltage spike would have infinite voltage. In practice, we see spikes of several hundred to several thousand volts, depending on the particular cirsumstances.
Why alternating current induce voltage across an inductor?
due to change in flux
What happens when current flows through inductor?
When current flows through an inductor, a magnetic field is created. That's the simple explanation. More formally, an inductor is a magnetic device that reactively resists a change in current by presenting a voltage backwards towards the source. The equation for an inductor is ... di/dt = v/L ... which means the the rate of change in current in amperes per second is proportional to voltage in volts and inversely proportional to inductance in henrys. Theoretically, this means that, if you place a constant voltage across an inductor, current will linearly increase without bounds to infinity. Practically, this will be limited by resistance and current capacity.
