Define susceptance and admittance for parallel circuit.

1 Answer

Answer :

Admittance (Y): Admittance is defined as the ability of the circuit to carry (admit) alternating current through it. It is the reciprocal of impedance Z. i.e Y = 1/Z. For parallel circuit consisting two branches having impedances Z1 and Z2 in parallel, the equivalent impedance of parallel combination is given by,

image

where, Y is the equivalent admittance of the parallel circuit Y1 and Y2 are the admittances of the two branches respectively.

If the equivalent impedance is expressed as image

then the admittance is obtained as,

image



Susceptance (B):

Susceptance is defined as the imaginary part of the admittance. It is expressed as, 

image

In DC circuit, the reactance is absent, hence X = 0 and susceptance equals to zero.

Related questions

Description : In transmission line, which of the following is the first step in the procedure of using stub matching? A. Calculate stub susceptance. B. Calculate load admittance C. Connect stub to load D. Transform conductance to resistance

Last Answer : B. Calculate load admittance

Description : Capacitive susceptance is a measure of?

Last Answer : Capacitive susceptance is a measure of a purely capacitive circuit's ability to pass current.

Description : Define admittance and state its unit.

Last Answer : Admittance is defined as the ability of the circuit to carry (admit) alternating current through it.  OR  It is the reciprocal of impedance Z. i.e Admittance Y = 1/Z.  Unit: Its unit is siemen (S) or mho (Ʊ).

Description : The magnetism left in the iron after exciting field has been removed is known as (a) permeance (b) residual magnetism (c) susceptance (d) reluctance

Last Answer : (b) residual magnetism

Description : The diagonal elements of a nodal admittance matrix are strengthened by adding :  (A) Shunt capacitors (C) Generators (B) Shunt inductances (D) Resistive loads

Last Answer : A

Description : Which of the following is the SI unit for admittance? A) Ohm B) Henry C) Farad D) Siemens

Last Answer : Which of the following is the SI unit for admittance? A) Ohm B) Henry C) Farad D) Siemens

Description : what is the reciprocal of admittance?

Last Answer : impedance is the reciprocal of admittance.

Description : What do you say to gain admittance through the pearly gates?

Last Answer : In. As would all mankind.

Description : How much personality should come through in a college admittance essay?

Last Answer : For an MBA, my personal opinion would be no, but I would love to hear from some University types in the know. I do know in the corporate world, personality is not so much what you want to see in a resume.

Description : Name the diagonal and off diagonal elements of bus admittance matrix.

Last Answer : The diagonal elements of bus admittance matrix are called self admittances of the buses and off diagonal elements are called mutual admittances of the buses.

Description : What is bus admittance matrix?

Last Answer : The matrix consisting of the self and mutual admittances of the network of a power system is called bus admittance matrix.

Description : What is Admittance?

Last Answer : Admittance: Admittance is the reciprocal of impedance. It is denoted by the letter Y' and the unit of measurement is mho. Y = I/E = RMS current / RMS voltage. Equation used in admittance a. Conductance G' = Y * cosϕ = ... d. In special cases when X = zero, then G = 1/R and R = zero, then B = 1/X.

Description : Admittance relay is _______ relay. (a) impedance (b) directional (c) non-directional (d) none of the above

Last Answer : (b) directional

Description : A 1000 × 1000 bus admittance matrix for an electric power system has 8000 non-zero elements. The minimum number of branches (transmission lines and transformers) in this system are _____ (up to 2 decimal places)

Last Answer : Ans: 3500.00

Description : um of the elements of row i equal to shunt admittances connected to bus i. If this summation is zero, indicates there is no a) shunt admittance b) mutual coupling c) both 1 and 2 d) none of the above

Last Answer : c) both 1 and 2

Description : The square root of the ratio of line impedance and shunt admittance is called the (a) surge impedance of the line (b) conductance of the line (c) regulation of the line (d) none of the above

Last Answer : (a) surge impedance of the line

Description : The square root of the ratio of line impedance and shunt admittance is called the (a) surge impedance of the line (b) conductance of the line (c) regulation of the line (d) none of the above

Last Answer : (a) surge impedance of the line

Description : In which of the following transmission lines, the value of the Shunt admittance should be approximated to zero ? (A) A 66 kV 35 km long line (B) A 132 kV 200 km long line (C) A 220 kV 300 km long line (D) A 400 kV 500 km long line

Last Answer : In which of the following transmission lines, the value of the Shunt admittance should be approximated to zero ? (A) A 66 kV 35 km long line (B) A 132 kV 200 km long line (C) A 220 kV 300 km long line (D) A 400 kV 500 km long line

Last Answer : The shunt admittance of a transmission line is given by Y = G + j ω C

Last Answer : Admittance relay is directional relay.

Last Answer : Req= (1/1200 +1/560 + 1/2.1)^-1        = 2.1 ohms RT= 2.1 + 7.8      = 9.9 ohms IT = V/R = 24/9.9                = 2.4 A Veq= R I =  2.1 2 ... 7.8         = 12.096 w                 = 44.928 w _________________________________________ By: Ellis-Junior Kamatjipose [email protected]

Description : Parallel rc circuit

Last Answer : Parallel rc circuit

Description : Parallel circuit rules

Last Answer : Parallel circuit rules

Description :  Compare series and parallel circuit in terms of voltage and current.

Last Answer : Series circuits Parallel circuits Only ONE path for current to flow in a closed circuit Number of path for current to flow in a closed circuit Current remains the SAME ... Voltage is DIFFERENT across each component Voltage remains the same across each component of the circuit

Description : Three capacitors 15µf, 18µf and 12µf are connected in a circuit. Find equivalent capacitance when they are connected in – 1) Series 2) Parallel

Last Answer : Ans: Value of equivalent capacitance: Given: C1= 15μF, C2=18 µF, C3= 12µF  i)For Series combination of capacitors: 1/Cs = (1/C1)+( 1/C2) +(1/C3) = (1/15)+( 1/18)+( 1/12) 1/Cs = 0.0666+0.0555+0. ... Cs = 4.868 µF   ii) For parallel combination of capacitors: Cp = C1 + C2 + C3 = 15 +18+ 12 = 45 µF 

Description : Consider a circuit with three parallel branches connected across a DC supply. What is the ratio of the branch currents I1 : I2 : I3 if the branch resistances are in the ratio of 2 : 3 : 4 respectively? A) 2 : 3 : 4 B) 6 : 4 : 3 C) 4 : 3 : 2 D) None of these

Last Answer : Consider a circuit with three parallel branches connected across a DC supply. What is the ratio of the branch currents I1 : I2 : I3 if the branch resistances are in the ratio of 2 : 3 : 4 respectively? A) 2 : 3 : 4 B) 6 : 4 : 3 C) 4 : 3 : 2 D) None of these

Description : Consider a circuit with four 10 Ω resistors connected in parallel and the current flowing through the circuit is 5 A. What will be the current if the above 4 resistors are connected in parallel? A) 5 A B) 50 A C) 500 A D) None of these

Last Answer : Consider a circuit with four 10 Ω resistors connected in parallel and the current flowing through the circuit is 5 A. What will be the current if the above 4 resistors are connected in parallel? A) 5 A B) 50 A C) 500 A D) None of these

Description : Consider the following statements : If a high Q parallel resonant circuit is loaded with a resistance  1. The circuit impedance reduces.  2. The resonant frequency remains the same.  3. The bandwidth reduces.  Which of the above statements is/are correct ?

Last Answer : 1

Description : When an additional resistor is connected across an existing parallel circuit, the total resistance: A. remains the same B. decreases by the value of the added resistor C. increases by the value of the added resistor D. decreases

Last Answer : When an additional resistor is connected across an existing parallel circuit, the total resistance: decreases

Description : The series and parallel resonance on L-C circuit differs in that?

Last Answer : The series and parallel resonance on L-C circuit differs in that series resistance needs a low-resistance source for sharp rise in current.

Description : A parallel AC. circuit in resonance will?

Last Answer : A parallel AC. circuit in resonance will have a high impedance.

Description : At ______ frequencies the parallel R-L circuit behaves as purely resistive.

Last Answer : At very high frequencies the parallel R-L circuit behaves as purely resistive.

Description : The purpose of a parallel circuit resonance is to magnify?

Last Answer : The purpose of a parallel circuit resonance is to magnify voltage.

Description : The power factor at resonance in R-L- C parallel circuit is?

Last Answer : since a rlc circuit at resonance behaves like a pure resistive circuit, i.e there is no phase difference between current and voltage, hence the power factor is unity.

Description : Define quality factor for parallel resonance and write its mathematical expression.

Last Answer : Quality Factor of Parallel AC Circuit at resonance: The quality factor or Q-factor of parallel circuit is defined as the ratio of the current circulating between two branches of the circuit to the current ... from the source. It is the current magnification in parallel circuit.  Formula: 

Description : Define active circuit and passive circuit.

Last Answer : Active circuit: Active Circuit is one which contains at least one source of e.m.f. or energy, is called active circuit.  Passive Circuit: Passive Circuit is one which does not contain any source of e.m.f. or energy in it, is called passive circuit.

Description : Define active power and reactive power for RLC series circuit.

Last Answer : Active Power (P): Active power (P) is given by the product of voltage, current and the cosine of the phase angle between voltage and current.  Unit: watt (W) or kilo-watt (kW) or Mega-watt ... volt-ampere-reactive (VAr), or kilo-volt-ampere-reactive (kVAr) or Mega-voltampere-reactive (MVAr) 

Description : Define reluctance and permeance with respect to magnetic circuit.

Last Answer : Reluctance: The opposition offered by magnetic circuit to establish magnetic flux in it, is called as “Reluctance”.  Permeance: It is the reciprocal of reluctance and implies the magnetic core’s readiness with which magnetic flux is developed. 

Description : Define balanced and unbalanced load in three phase circuit.

Last Answer : Balanced Load: When all the imedances of 3 phases are equal in magnitude and of same nature then load is said to be balanced.  Unbalanced Load: When all the imedances of 3 phases are not equal in magnitude and of different nature then load is said to be unbalanced.

Description : Define unilateral and bilateral circuit.

Last Answer : i) Unilateral circuit: If the characteristic, response or behavior of circuit dependents on the direction of flow of current through its elements, then the circuit is called as a unilateral ... as a bilateral circuit e. g. circuits containing elements like resistances, inductances and capacitances. 

Description : Define- (i) Node (ii) Loop for a DC circuit

Last Answer : Ans: i) Node: A point or junction at which two or more elements of network are connected is called as node. ii) Loop: A closed path for flow of current in an electrical circuit is called loop.