0
What else can I help you with?
What is the three basic types of eddy current coils?
The three basic types of eddy current coils are absolute, differential, and bridge coils. Absolute coils measure the absolute impedance or phase angle change of the eddy current probe. Differential coils measure the slope or rate of change of impedance, while bridge coils compare the impedance changes between two coils.
What is the Basic Three Electrical Quantities?
The basic three electrical quantities are voltage (V), current (I), and resistance (R). Voltage is the electrical force that moves an electric charge. Current is the flow of electric charge. Resistance is the opposition to the flow of electric current.
What are The three factors that influence the amount of heat energy released by an electric conductor?
The three factors are: the material of the conductor (resistivity), the current flowing through the conductor, and the time duration for which the current flows.
What are three rules of electricity?
Current flows from higher voltage to lower voltage. The total current entering a junction must equal the total current leaving the junction. Resistance in a circuit reduces the flow of current.
What are the three main characteristic of a magnetic field produced by current?
The three main characteristics of a magnetic field produced by current are: Direction: The field lines form closed loops and follow the right-hand rule. Strength: The strength of the field is directly proportional to the current flowing through the conductor. Distance: The magnetic field strength decreases as you move away from the current-carrying conductor.
What the three type of opposition to current flow impedance represants?
I think it's only two types. Resistance, the real part of impedance, and reactance,the imaginary part. All possible values of impedance can be made from suitable amountsof each of these.If you absolutely must have three types, then you'll be relieved to hear that reactancecan be positive (inductive, voltage leading) or negative (capacitive, voltage lagging).
What is the three basic types of eddy current coils?
The three basic types of eddy current coils are absolute, differential, and bridge coils. Absolute coils measure the absolute impedance or phase angle change of the eddy current probe. Differential coils measure the slope or rate of change of impedance, while bridge coils compare the impedance changes between two coils.
What are the three elements of electricity?
The three basic elements of electricity are voltage, current, and resistance. Voltage is the force or pressure that drives the electrical current. Current is the flow of electric charge. Resistance is the opposition to the flow of electric current.
State three things which can affect the voltage in a circuit?
Ohms Law says that Voltage = Current * Ohms, so the twothings that can affect the voltage in a circuit are Current and Ohms. If have a non resistive impedance, i.e. a capacitor or inductor forming a reactance, then frequency can also affect the voltage but, mathematicaly, reactance is a frequency domain form of impedance, so my answer stands - Current and Ohms.
Why ohm's law is not applicants in high power transmission lines?
It's applicable anytime you have a combination of any three: charge, voltage, current, power, or impedance.
What is the Basic Three Electrical Quantities?
The basic three electrical quantities are voltage (V), current (I), and resistance (R). Voltage is the electrical force that moves an electric charge. Current is the flow of electric charge. Resistance is the opposition to the flow of electric current.
What are three important characteristics of electric circuit?
Voltage, frequency, current, impedance, and what the circuit is supposed to do are all important.
What is zero sequence impedance in transmission line?
In symmetrical components, there are three types of impedances - positive sequence (balanced), negative sequence (unbalanced), and zero sequence (ground). In a transformer, positive and negative are equal. Ground impedance is determined by the (same factors as the) positive sequence and is based on the flux paths available through the transformer core that can induce ground current.
What is an input reactor?
Just like a line reactor.. A 3-phase Line Reactor is a set of three (3) coils (also known as windings, chokes or inductors) in one assembly. It is a series device, which means it is connected in the supply line such that all line current flows through the reactor, as shown below. Line Reactors are current-limiting devices and oppose rapid changes in current because of their impedance. They hold down any spikes of current and limit any peak currents. This resistance to change is measured in ohms as the Line Reactor's AC impedance (XL) and is calculated as follows: XL = 2 π f L (ohms), where: f = frequency in hertz (cycles per second) harmonic frequency examples: harmonic (60 Hz)frequency (Hz)5th3007th42011th660 L = reactor inductance in henries (H), millihenries (mH) -- H x 10-3, microhenries (µH) -- H x 10-6 By inspection of the XL formula, the Line Reactor is directly proportional to the frequency (f) and the inductance (L). That is, if the impedance of a Line Reactor is 10 ohms at 60 Hz, then at the 5th harmonic (300 Hz) the impedance is 50 ohms. If the inductance (L) is increased, then the impedance will increase proportionally. This increase in Line Reactor impedance will reduce the current in the line. The higher the frequency (Hertz), the lower the current. A Line Reactor's DC resistance (R-ohms) is very low by design so that the power losses (watts-I2R) are low. Line Reactors are rated by % impedance, voltage and current. However, they are sized by % impedance, voltage and motor horsepower. The motor horsepower determines the necessary current rating for the Line Reactor. Line Reactors are rated by impedance, voltage and current. # Impedance (% impedance of load Z) The load impedance (Z) is calculated by this formula: Z = V/I, where Z = load impedance (ohms), V = line voltage (volts), and I = line current (amps) This percent of load impedance also determines the voltage drop across the Line Reactor. For example, a 5% Line Reactor would have a 5% voltage drop. # Voltage rating Since a Line Reactor is a current-sensitive device, the voltage rating is needed for dielectric concerns as a maximum voltage and horsepower. It is also used to determine the current rating when given only voltage and horsepower. # Current rating (amperes) This is the current required by the load(s). It is total current flowing to the load(s) and through the reactor. This current is measured in amperes (amps).
Why must you add the resistance and reactance of a circuit in series by the phythagorean method in order to find the total impedance?
The resistance and reactance of an a.c. load are determined from the phasor diagram for that load. A phasor diagram is very similar to vector diagram, and represents the voltage drop across the resistive component of the load as being in phase with the load current, and the voltage drop across the reactive component as lagging the load current by 90 degrees. The vector sum of these two voltage drops will equal the value and phase-relationship of the supply voltage.If we now divide each of these three voltages by the supply current, we will converted the phasor diagram into what is called an 'impedance triangle', in which the resistance is represented horizontally, the reactance is represented vertically, and the impedance is represented by the resulting hypotenuse. So, to find the hypotenuse (i.e. the impedance) we must use Pythagoras's Theorem to vectorially-add the horizontal (resistance) and vertical (reactance) components.
What are the three electrical guantities?
The three electrical quantities are current voltage and resistance. Current is measured in amperes (A) and is the rate at which electricity flows through a conductor. Voltage is measured in volts (V) and is the electrical force pushing the current through the conductor. Resistance is measured in ohms () and is the opposition to the flow of current. Current - measured in amperes (A) Voltage - measured in volts (V) Resistance - measured in ohms ()
What is Regulation of alternator by synchronous impedance method?
It is conducting OC and SC tests on the given three phase alternator and determining the regulation by synchronous impedance method.
