3X3 inverse of matrix short trick
Last Answer : 3X3 inverse of matrix short trick
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Sep 7, 2019
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anonymous
For a given matrix inverse of a matrix is
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Jul 26, 2019
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anonymous
Last Answer : The inverse definite mean time relays are used for over current and earth fault protection of transformer against internal short-circuits.
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2.6k views
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Mar 20, 2018
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anonymous
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Last Answer : The relay with inverse time characteristic will operate within 5 to 10 sec.
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Mar 20, 2018
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anonymous
Capacitive reactance
Last Answer : Capacitive reactance formula
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Jun 11, 2019
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anonymous
Parallel Reactance and Resistance Example 1
Last Answer : Parallel Reactance and Resistance Example 1
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May 30, 2019
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anonymous
AC Circuits with Resistance but No Reactance
Last Answer : AC Circuits with Resistance but No Reactance AC Circuits with Resistance but No Reactance Series resistances let two resistances R 1 and R 2 are connected in series as shows in figure and there ... voltage. Voltage V A is common to both the branch hence voltage V A is common reference.
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May 26, 2019
by
anonymous
Capacitive reactance is more when?
Last Answer : Capacitive reactance is more when capacitance is less and frequency of supply is less.
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Mar 24, 2018
by
anonymous
What is the unit of reactance?
Last Answer : Unit of reactance is Ohms ( Ω ) .Reactance is denoted by X .
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Jan 7, 2018
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anonymous
what is the reciprocal of reactance?
Last Answer : reciprocal of reactance is susceptance.
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459 views
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Sep 30, 2017
by
anonymous
Define impedance diagram and reactance diagram.
Last Answer : Impedance diagram: Impedance diagram is the simplified equivalent circuits of single line or one line diagrams of power system in which all components are represented by their equivalent circuit. ... machines are neglected and is used only for fault current calculation is called reactance diagram.
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242 views
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May 6, 2020
by
anonymous
What do you mean by exciting resistance and exciting reactance?
Last Answer : At no-load, a transformer behaves as a highly inductive load connected to the system which contains some resistance and inductance in parallel. The resistance is called exciting resistance R0 = V1/I w and reactance is called exciting reactance, X0 = V1/I mag
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2 answers
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Apr 28, 2020
by
anonymous
If the % reactance upto the fault point is 20%, then the short circuit current will be
Last Answer : If the % reactance upto the fault point is 20%, then the short circuit current will be 5 times the full load current
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May 8, 2018
by
anonymous
A single phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu voltage regulation at 0.8 pf lagging would he
Last Answer : A single phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu voltage regulation at 0.8 pf lagging would he 0.52
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May 3, 2018
by
anonymous
Consider the following statements. Which of these statements are correct ? (1) Reactance relays are preferred for ground fault relaying (2) Impedance relays are most suitable for:protecting long transmission lines (3) Mho relays are best ... (1) and (3) (C) (2) and (4) (D) (1), (2) and (4)
Last Answer : Consider the following statements. Which of these statements are correct ? (1) Reactance relays are preferred for ground fault relaying (2) Impedance relays are most suitable for:protecting long transmission lines (3) Mho relays are ... (1) and (3) (C) (2) and (4) (D) (1), (2) and (4)
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Apr 29, 2018
by
anonymous
Reactance relay is normally preferred for protection against
Last Answer : Reactance relay is normally preferred for protection against earth faults
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Apr 29, 2018
by
anonymous
Ratio of the rotor reactance X to the rotor resistance R for a two-phase servo motor (A) is equal to that of a normal induction motor (B) is less than that of a normal induction motor (C) ... than that of a normal induction motor (D) may be less or greater than that of a normal induction motor
Last Answer : C
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Apr 28, 2018
by
anonymous
A 4000 kVA, 11 kV/132 kV delta-star connected 3-phase transformer has reactance, x1 = 0.12 p.u. The actual value of x1 referred to the low voltage side is (A) 0.85 Ω (B) 3.63 Ω (C) 36.3 Ω (D) 252 Ω
Last Answer : A 4000 kVA, 11 kV/132 kV delta-star connected 3-phase transformer has reactance, x1 = 0.12 p.u. The actual value of x1 referred to the low voltage side is 3.63 Ω
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Apr 28, 2018
by
anonymous
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A reactance relay is (A) Voltage restrained directional relay (B) Directional restrained over-current relay (C) Voltage restrained over current relay (D) Directional restrained over voltage relay
Last Answer : A reactance relay is Directional restrained over-current relay
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Apr 28, 2018
by
anonymous
Circuits with XL Alone
Last Answer : Circuits with XL Alone X L values in series let two inductive reactances X L 1 and X L 2 are connected in series and has value 50 ohm and 50 ohm respectively. 100 volts A C ... phasor. And it is taken horizontal. Phase angle between inductive current and voltage is same 90 degree.
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May 26, 2019
by
anonymous
A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will?
Last Answer : A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will not start at all.
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Mar 20, 2018
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anonymous
An inverse transducer converts (a) electrical energy to any other form of energy (b) electrical energy to light energy (c) mechanical displacement into electrical signal (d) electrical energy to mechanical form
Last Answer : A
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Apr 10, 2018
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anonymous
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In a static over-current relay, inverse time characteristics are obtained by (a) A differentiating circuit (b) An integrating circuit (c) A transistor amplifier (d) A transistor switch
Last Answer : B
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Apr 10, 2018
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anonymous
Inverse definite minimum time lag relay is also called (A) pilot relay (B) differential relay (C) over current relay (D) directional overcurrent relay
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Apr 9, 2018
by
anonymous
Last Answer : Circuits with capacitive reactance X C alone. Capacitive reactance X C values in series. There is no resistance or inductive reactance only capacitive reactance is there. Let two capacitive ... horizontal in phasor diagram. The total current I T leads voltage V A by 90 degree.
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May 27, 2019
by
anonymous
Potier reactance of an alternator is almost the same as (a) Field winding reactance (b) Total armature reactance (c) Leakage reactance of field winding (d) Armature leakage reactance
Last Answer : Potier reactance of an alternator is almost the same as Armature leakage reactance
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May 13, 2018
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anonymous
The operating characteristics of a reactance type distance relay (A) a stepped waveform for increasing reactance (B) a straight line for a constant reactance (C) a circle for a constant reactance (D) a set of circles for variable reactances
Last Answer : The operating characteristics of a reactance type distance relay a straight line for a constant reactance
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Apr 25, 2018
by
anonymous
A 3-phase star-connected 75 MVA, 25 kV 3-phase synchronous generator has a synchronous reactance of 1.0 p.u. The per unit value to a 90 MVA base and 30 kV is (A) 2/15 p.u. (B) 5/6 p.u. (C) 1.0 p.u. (D) 1.2 p.u.
Last Answer : A 3-phase star-connected 75 MVA, 25 kV 3-phase synchronous generator has a synchronous reactance of 1.0 p.u. The per unit value to a 90 MVA base and 30 kV is 5/6 p.u.
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Apr 25, 2018
by
anonymous
The maximum possible power of a 3-phase synchronous motor with synchronous reactance 0.8 p.u. connected to a bus-bar of 1.0 p.u. and excitation adjusted to 1.2 p.u. is (A) 0.5 p.u. (B) 0.96 p.u. (C) 1.5 p.u. (D) 1.8 p.u.
Last Answer : The maximum possible power of a 3-phase synchronous motor with synchronous reactance 0.8 p.u. connected to a bus-bar of 1.0 p.u. and excitation adjusted to 1.2 p.u. is 1.5 p.u.
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Apr 25, 2018
by
anonymous
A single phase, 2000V alternator has armature resistance and reactance of 0.8 ohm and 4.94 ohm respectively. The voltage regulation of the alternator at 100A, 0.8 leading pf is (A) 7% (B) - 8.9% (C) - 6.3% (D) 0%
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Apr 14, 2018
by
anonymous
What is the reactance of a 3H inductor when the frequency is 120 Hz? A. 2260 ohm B. 2060 ohm C. 360 ohm D. 0
Last Answer : 2260 ohm is the reactance of a 3H inductor when the frequency is 120 Hz.
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Apr 12, 2018
by
anonymous
If X is the system reactance and R is its resistance, the power transferred is maximum when (1) X=R (2) X=1.414 R (3) X=1.732 R (4) X=2R
Last Answer : x = 1.732R
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Apr 11, 2018
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anonymous
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The synchronous reactance of the synchronous machine is the ratio between: (A) open circuit voltage and short circuit current at Constant field current (B) short circuit Voltage and open ... at different field current (D) short circuit voltage and open circuit current at different field current
Last Answer : The synchronous reactance of the synchronous machine is the ratio between: open circuit voltage and short circuit current at constant field current
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Apr 9, 2018
by
anonymous
A Reactor having an inductive reactance of 4 ohm is connected to the terminals of a 120 V AC generator. Calculate the power associated with the reactor. (A) 3.6 kvar (B) 30 kvar (C) 7.2 kvar (D) 4.16 kvar
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Apr 5, 2018
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anonymous
Last Answer : In an induction motor, if the rotor resistance is equal to stand-still reactance then the maximum torque is equal to starting torque.
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Mar 31, 2018
by
anonymous
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The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes_____ohms.
Last Answer : The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes 10 ohms.
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Mar 24, 2018
by
anonymous
What's the inverse function of y=1/x^3?
Last Answer : answer:It sounds like you use a graphical approach to find inverse functions. That is, you take the graph of the function and flip it over the diagonal line formed by the line y = x. Try this algebraic method: First, switch the x and the y in the equation. Then solve for your new y.
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Feb 27
by
anonymous
Why do I keep getting stuck when taking the derivative of the inverse cosecant function?
Last Answer : http://archives.math.utk.edu/visual.calculus/3/inverse_trig.1/6.html
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Feb 27
by
anonymous
How to solve direct and indirect/inverse variation problem?
Last Answer : .just talk your way thru this ... 1. wire2 is 3 x longer than wire1 .... thus resistance of wire2 has to be 3 x larger than wire1 on the basis of length, alone. 2. wire 2 has a diameter that is 1.5 x larger than wire1 . ... L1/D1^^2 R2 =k * 3*L1/(1.5*D1)^^2 ... you can solve it from there ... ..
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Feb 27
by
anonymous
If the body is in a state of equilibrium then the energy is minimum. This statement isconsidered in . a.inverse matrix method b.weighted residual method c.Galerkin’s principle d.the minimum potential energy principle
Last Answer : d.the minimum potential energy principle
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Feb 6
by
anonymous
Which of the following is not a method for calculation of the stiffness matrix? a.The minimum potential energy principle b.Galerkin's principle c.Weighted residual method d.Inverse matrix method
Last Answer : d.Inverse matrix method
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Feb 6
by
anonymous
Two successive translations are a.Multiplicative b.Inverse c.Subtractive d.Additive
Last Answer : d.Additive
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Feb 6
by
anonymous
In Coordinates, a points in n-dimensional space is represent by(n+1) coordinates. a.Scaling b.Homogeneous c.Inverse transformation d.3D Transformation
Last Answer : b.Homogeneous
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Feb 6
by
anonymous
which inverse operation would be used to verify the following equation? 54 ÷ 9 = 6 -General Knowledge
Last Answer : 9 * 6 = 54 would be used to verify the inverse operation equation of 54 ÷ 9 = 6.
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Feb 3
by
anonymous
Define the term of Inverse of a relation. -Maths 9th
Last Answer : For any binary relation R, a second relation can be constructed by merely interchanging first and second components in every ordered pair. The relation thus obtained is called the inverse of the first one and designated as R-1. Thus, R-1 = {(y, x ... {(1, 2), (2, 3), (3, 4), (5, 4)}. So (R-1)-1 = R.
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Feb 2
by
anonymous
what is the inverse of x^3+2?
Last Answer : 5
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Feb 1
by
anonymous
What is the multiplicative inverse of 1/4?
Last Answer : 0.25
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Feb 1
by
anonymous
Which statement represents the inverse of p → q?
Last Answer : A+
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Feb 1
by
anonymous
which is the inverse of the following conditionalIf the weather is fair, then I will take a walk.?
Last Answer : If the weather is not fair, then I will not take a walk.
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Feb 1
by
anonymous
is this statement true or falseThe inverse is the negation of the conditional.?
Last Answer : 1
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Feb 1
by
anonymous
