In Chopper operation lo is negative, the direction of power flow will be from to

Q: At startup, line connected induction machines can draw up to X times their rated current. 4 0.5

A: The rotor impedance of the induction motor when parameters are referred to the primary: Z=Rs+jX At…

Q: A 3-phase 60 Hz I.M. has a rated speed = 1650 R.P.M., its speed at slip = -0.15 is equal to:

A: In this question,  We need to determine the speed at the slip = -0. 15 We know Synchronous speed N=…

Q: Identify test/tests is applicable only to Salient pole type of Alternator. O a. Blocked Rotor test O…

A: In this we will write about test applicable for salient alternator...

Q: 10) In carrier current protection the purpose of the wave trap is for trapping power frequency waves…

A:

Q: In generator, the generated e.m.f will increase with the load. separately excited dc generator self…

A: In this question we need to choose a correct option.

Q: Determine the symmetrical components of the three currents Ia = 10cis0, Ib = 10cis230, Ic = 10cis130…

A:

Q: In forward regeneration mode of operation in chopper, one of the following condition happens Load…

A: Forward regeneration mode of the operation in chopper  What will be happened

Q: An air craft control system has H(s) = 1 and G(s) = 52 (s + 3)(s + 5) s(s+ 2)(s + 4)(s + 6)

A:

Q: .. .Francis turbine is alan .2 Friction turbine Reaction turbine Friction and Impulse turbine both.

A: Turbines are the most essential part of a power generation done by hydro power plant, In hydro power…

Q: fill inthe blank : field winding has large numberofturns of thin copper wire.                  a.…

A: Correct option is Shunt. shunt field winding has large number of turns of thin copper wire.  Where…

Q: 50 Hz, 3-phase induction motor is working at a full load speed of 1440 r.p.m. The full load slip…

A: induction motor always runs at near synchronous speed For 50 HZ synchronous speeds are  for 4 pole…

Q: Quèstion 3 In under compounded generator, full load terminal voltage is less than no load terminal…

A: The solution is given below

Q: Stator core of alternator is built up of steel sheet lamination of thickness between a) 0.35 mm to…

A: Stator core of alternator

Q: An asynchronous generator can normally be started (a) Off-line (must be disconnected from the grid)…

A: Induction generator Induction machine when used as generator then its is called as a induction…

Q: The perunit value of acceleration power of 200 MVA generator is 0.15. What will be the actual…

A: as per our guidelines we are supposed to answer only one question. Kindly repost other questions as…

Q: AND APPARENT POWER 159 a. The reactive power absorbed by the reactor b. The apparent power absorbed…

A: In this question,  A reactor is connected to the supply 120V, 60Hz system.  We need to determine the…

Q: AL=FFh. After INC AL, CF = a. No change О а. O b. complement of previous carry с. О d. 1

A: In this question we will write about INC instruction...

Q: Quèstion 5 In over compounded generator, full load terminal voltage is less than no load terminal…

A: In this question, choose the correct option In over compound generator, full load terminal voltage?…

Q: Hw2.2-6: Draw the phasor for the synchronous compensator at each of the following operating…

A: Like capacitor bank, we can use an overexcited synchronous motor to improve the poor power factor of…

Q: select one quickly Synchronous counter is ........... than asynchronous counter. a) faster, b)…

A: Synchronous counter is counter which clock input for each flip flop given at a time and output of…

Q: In single phase energy meter, is placed at the edge of Aluminum disc, which controls the speed of…

A: Single phase energy meter

Q: arcing c

A:

Q: N.m and efficiency of added of the rotor to rec

A: The induction motor work on the principle of magnetic induction. An emf is developed in the rotor…

Q: In large transformers, the total copper losses may vary from the rated output. % of 0.8 to 1.5 0.2…

A: In the Large transformer  The total copper losses may vary from the?

Q: "What will be the frequency (in kHz) of transient and peak restriking voltage (in kV) repectively

A:

Q: •The D.C shunt generators consist of two parts, • The conditions for voltage build-up in D.C shunt…

A: The DC generator consists of two parts Stator and Rotor. Stator part of generator consists of that…

Q: False True The speed of d.c shunt motor is decreased if the field current is increased Wave windings…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: A curve is draw in descending order of load with time.

A:

Q: loaded condition, the efe action is more in DC mach lect one: O True O False

A: Effect of armature flux on main flux is known as armature reaction.

Q: In Chopper operation I0 is positive , the direction of power flow will be from .............…

A: In Type A chopper, Current Io is positive.

Q: Load flow study is carried out for O Stability studies Fault calculations Load frequency control…

A: Given  Load flow study

Q: In Synchronous generator, field is called rotor. Select one: True O False

A: Synchronous generator: It is also called as alternator. It converts mechanical input power to AC…

Q: The field winding of DC generator has capable of carrying the full-load current and it is usually…

A: The field winding of DC Series generator has capable of carrying the full, load current and it is…

Q: Q-From the figure below, select the capital letter representing the external load characteristics of…

A:

Q: how was the load 300<-36.86 achieved?

A: We know that power factor can be represented in terms of cosine function as shown below.

Q: explan capacitive compensation for power factor control.

A: The explanation is as follows.

Q: Hw2.2-2: Draw the phasor for the synchronous compensator at each of the following operating…

A:

Q: The reversible steady flow process 1-2-3-4-5-3 o

A:

Q: 4 The rotor power output of 3-phase induction motor is 15 kW. The rotor copper losses at a slip of…

A: According to the question we have to find the value of the rotor copper loss.

Q: Q4. Q5. An isochronous governor has a droop setting of: 0% (b) 4% 5% 100% infinity Which of the…

A:

Q: What is the maximum recommended limit of RMS voltage (in percent) for continuous operation of shunt…

A: Answer is 110%. This is the nominal fundamental voltage across the capacitor. It should be adjusted…

Q: 5) The method (s) to improve the Power Factor: a. Use of synchronous motors. b. Use of synchronous…

A:

Q: The type generator field winding is supplied from the external D.C. source.

A: there are different types of DC machine available 1. self-excited DC motor 2. series DC motor 3.…

Q: generator is supplying 295 A to- The field current of generator is The current parallel path is O…

A:

Q: bectively if the primary winding is conne

A:

Q: In Hydroelectric Power, working of turbines causes a lot of noise pollution   Select one: True…

A: Hydroelectric power plant : hydroelectric power plant is power plant in which the hydropower which…

Q: Tidal energy formed O a. 70 percent due to the sun and 30 percent due to the moon O b. 70 percent…

A: Choose the correct option Tidal energy formed by ?

Solenoids

A solenoid is a common term for a telephone coil used as an electromagnet. It also refers to any device that uses a solenoid to convert electrical energy into mechanical energy. The device generates a magnetic field from an electric field and uses the magnetic field to produce precise motion. Solenoid valves are often used to change power, such as in-car transmitters or valves, such as in the fuel system.