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What is the reactance of a rheostat?
In theory, a rheostat has only resistance. It lacks any capactive or inductive properties, and, therefore, has no reactance. In practice, a rheostat, which is like a potentiometer without a "third" terminal. One of the ends (terminals) of a potentiometer, if it is removed entirelym will leave a two-terminal device called a rheostat, or variable resistor. In practice, all similar devices have some distributed capacitance and inductance associated with them. The construction of the device as well as the materials out of which it is made (as well as the operating frequency) will determine how much reactance the device has.
Why is circuit current reduced when a capacitors added to the circuit?
In the case of an a.c. circuit, capacitors oppose current because of their capactive reactance, expressed in ohms. Capacitive reactance is inversely-proportional to the capacitance of the capactor and to the frequency of the supply. So, adding a capacitor is series with an existing load will reduce the load current. On the other hand, adding a capacitor in parallel with an existing load will decrease the load current.
What is KVAR?
KVAR Kilovolt-Ampere Reactive KVAR Kilovolt-Ampere-Reactance {| ! Acronym ! Definition | Formular for calculation of kvar |}
What is the unit of inductive reactance?
Inductive reactance, as well as capacitive reactance, is measured in ohms.
What does capacitive reactance oppose?
Inductive reactance.
What is the definition of an inductive reactance?
Opposition to the flow of AC current produced by an inductor. Measured in Ohms and varies in direct proportion to frequency.
What are the specifications of resistance?
specification of inductive load,capactive load,resistive load in laboratory
What is the Quantity Symbol for Reactance?
The quantity symbol for reactance is X.
What are the letters for Inductive Reactance?
The symbol for inductive reactance is XL.
What is the inverse of reactance?
The reciprocal of reactance is susceptance, expressed in siemens.
What is definition of impedence?
Impedance is usually written in equations as Z. Impedance is the real resistance (usualyl referred to as R), and the imaginary / reactive opposition (using an imaginary number 'i' or 'j', depending on your area of study). Z = R + j*n, where 'n' is the reactive opposition.Additional AnswerCurrent, in an A.C. circuit, is opposed by the resistance(R) of that circuit and the reactance (X) of that circuit. Reactance may be 'inductive reactance' (XL) or 'capacitive reactance' (XC) -depending on the nature of the circuit.Inductive reactance is directly proportional to the supply frequency; capacitive reactance is inversely proportional to the supply frequency; resistance is independent of frequency.Impedance (Z) is the vector sum (not algebraic sum) of a circuit's resistance and reactance, and may be considered as the total opposition to the flow of A.C. current.Resistance, reactance, and impedance are each measured in ohms.
How does doubling the frequency effect the reactance of an inducter and capacitor?
for inductor, reactance XL = 2*pi* f *L, if frequency doubles then reactance increase. But for capacitor, reactance Xc = 1/(2*pi*f*C). In this case if frequency doubles the reactance decrease.
