3X3 inverse of matrix short trick

**Last Answer :** 3X3 inverse of matrix short trick

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292 views
1 answer
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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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85 views
0 answers
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Jul 26, 2019
by
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
1 answer
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Mar 20, 2018
by
anonymous

**Last Answer :** The relay with inverse time characteristic will operate within 5 to 10 sec.

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115 views
1 answer
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Mar 20, 2018
by
anonymous

Capacitive reactance

**Last Answer :** Capacitive reactance formula

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72 views
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Jun 11, 2019
by
anonymous

Parallel Reactance and Resistance Example 1

**Last Answer :** Parallel Reactance and Resistance Example 1

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150 views
2 answers
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May 30, 2019
by
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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102 views
1 answer
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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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161 views
1 answer
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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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121 views
1 answer
asked
Jan 7, 2018
by
anonymous

what is the reciprocal of reactance?

**Last Answer :** reciprocal of reactance is susceptance.

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459 views
1 answer
asked
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
1 answer
asked
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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183 views
2 answers
asked
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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3.0k views
1 answer
asked
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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367 views
1 answer
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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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130 views
1 answer
asked
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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120 views
1 answer
asked
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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582 views
2 answers
asked
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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288 views
1 answer
asked
Apr 28, 2018
by
anonymous

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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147 views
1 answer
asked
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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82 views
1 answer
asked
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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231 views
1 answer
asked
Mar 20, 2018
by
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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1.9k views
1 answer
asked
Apr 10, 2018
by
anonymous

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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1.7k views
1 answer
asked
Apr 10, 2018
by
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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121 views
0 answers
asked
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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138 views
1 answer
asked
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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1.0k views
1 answer
asked
May 13, 2018
by
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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64 views
1 answer
asked
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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194 views
1 answer
asked
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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120 views
1 answer
asked
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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691 views
0 answers
asked
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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211 views
1 answer
asked
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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1.0k views
1 answer
asked
Apr 11, 2018
by
anonymous

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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271 views
1 answer
asked
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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139 views
0 answers
asked
Apr 5, 2018
by
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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241 views
1 answer
asked
Mar 31, 2018
by
anonymous

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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340 views
1 answer
asked
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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0 views
1 answer
asked
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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1 answer
asked
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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1 answer
asked
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.Galerkinâ€™s principle d.the minimum potential energy principle

**Last Answer :** d.the minimum potential energy principle

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1 answer
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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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1 answer
asked
Feb 6
by
anonymous

Two successive translations are a.Multiplicative b.Inverse c.Subtractive d.Additive

**Last Answer :** d.Additive

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1 view
1 answer
asked
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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2 views
1 answer
asked
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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1 answer
asked
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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1 answer
asked
Feb 2
by
anonymous

what is the inverse of x^3+2?

**Last Answer :** 5

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1 answer
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Feb 1
by
anonymous

What is the multiplicative inverse of 1/4?

**Last Answer :** 0.25

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0 views
1 answer
asked
Feb 1
by
anonymous

Which statement represents the inverse of p → q?

**Last Answer :** A+

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0 views
1 answer
asked
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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2 views
1 answer
asked
Feb 1
by
anonymous

is this statement true or falseThe inverse is the negation of the conditional.?

**Last Answer :** 1

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0 views
1 answer
asked
Feb 1
by
anonymous