In a synchronous generator, choose what happens to number of poles if the value of frequency is increased O a. The number of poles will decrease O b. The number of poles will be doubled O c. The number of poles will increase d. none of these options

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: The generated voltage per phase of an alternator is E0 while the speed of rotor rotation is 3000…

A: We know the relation between emf phase ans speed of rotor. Ephase=4.44Kpkdfrequency*flux*turn…

Q: The synchronous speed of the rotor is 2100 and the percentage is 0.02% and that the synchronous…

A: In this question,  We need to determine the synchronous speed of the field?

Q: At starting of an Induction motor, the frequency of the rotor induced voltage would be

A: Mutual Induction:  Whenever flux in one coil links with the second coil, an EMF is induced in the…

Q: Q6) A three-phase synchronous generator 4.6-KV and 500-KVA and 60-HZ and 4 poles with star…

A: Given that 3-phase synchronous generator 4.6KV,500KVA,60Hz,4 poles Y (star) connectionSynchronous…

Q: Explain how two or more alternators can be synchronised

A: We need to explain how two or more alternators can be synchronised.

Q: True or False: The voltage at the shunt field in a long-shunt generator is the same as the load's…

A:

Q: For 50 Hz system the maximum speed of a synchronous generator can be 3600 rpm O approximately 3000…

A: The Synchronous speed of  a synchronous generator  is given by formula  Ns =120f / P   Where, P =…

Q: When synchronous machines are operated as generators, peak voltages decrease in case of

A: In this question we will find When synchronous machines are operated as generators, voltage in case…

Q: If rotor of an induction motor turns at synchronous speed, the frequency of the rotor will be zero.…

A: In this question we need to verify the given statement is true or false.

Q: In the stator winding of a synchronous generator, the chording angle is for eliminating fifth…

A: Given, In the stator winding of a synchronous generator, the nth harmonic n = 5

Q: Question: In Dc chopper,the input voltage waveform is and the output voltage waveform is Option 1:…

A: In this question, choose the correct options What is input voltage waveform and what is output…

Q: i need  theory about Characteristic of Separately excited Generator

A: To write the characteristics of separately excited Generator

Q: Please solve this question in control system quickly

A: From the given figure we can see that ; Damping frequency - wd =8 rad/sec

Q: The type generator field winding is supplied from the external D.C. source. O Shunt O Self excited o…

A: Seld excited generator does not require addtional power DC supply.

Q: The shunt dc generator runs, but there is no output voltage because of Select one: O a all mentioned…

A: In a dc shunt generator, if there is no residual flux, the armature of the motor will not have…

Q: For 50 Hz system the maximum speed of a synchronous generator can be

A: Given data, Frequency f = 50 Hz. For maximum speed number of poles P = 2.

Q: In three-phase induction motor rotor speed is always greater than synchronous speed. Select one: O…

A: In induction motor the rotating magnetic field which is produced in the starter will generate flux…

Q: Draw the No Load characteristic From run (1) and calculate RF, show different lines of shunt field…

A: No load characteristic of a generator is drawn between open circuit voltage (Eo) and field current…

Q: In long shunt DC generator Series field winding current Ise is equal to

A: -The circuit diagram for long shunt DC generator is given below:

Q: Generators using salient pole structure rotors are called turbo-alternators. Select one: O True O…

A: The explanation is as follows.

Q: Design Synchronous counter with the sequence given below 1-4-6-7-0-1

A: we need to design synchronous counter.

Q: The full load speed of a 60 Hz, 3-phase induction motor is 1120 r.p.m. The number of poles in the…

A: induction motor always near to synchronous speed  and synchronous speed =120*frequencyn. of poles…

Q: the 1 Cire at stert) rotor cirouit has much lower impedance than magnetising eircuit. At start…

A: Given data: Iph=4.94 AP3ϕ=214.7 WR1=1.9 ΩVRY=29.8 V

Q: If it is desired to bring alternating current out of a generator, what kind of a "take-off" system…

A: If the alternating current is required from the generator a copper or brass rings are connected at…

Q: Series motor can be used in cranes upward and downward motions. O True O False

A: In this question we will write about dc series motor...

Q: A flat-compound DC generator is used when an essentially unvarying voltage is required True False

A: In this question we will write about flat compound generator...

Q: True or False Due to their shape, full-pole generators are more affected by wind and centrifugal…

A: Due to their shape, full-pole generators are more affected by wind and centrifugal forces than other…

Q: I need the curve between the power factor and mechanical load in synchronous motor

A: The relation between Power factor and mechanical load is given by inverted V- curve of motor. It is…

Q: Comment briefly on the relationship between input and output power at varying excitation levels and…

A: Infinite Bus Bar is the bus bar where many(infinite)  synchronous machines are connected.  The…

Q: The synchronous speed for 60 Hz induction motor can be equal to 3000 RPM. O True O False

A: An induction motor is a self starting motor and it doesn't run at the synchronous speed

Q: amature windings commonly used in DC machines a DC shunt generator are wound with a large numbe C…

A: 3. In Dc generator brushes are used to convertalterating current (ac) which is armature wlndingsto…

Q: operating frequency

A: Given- Power factor= 0.8 Frequency= 62 Hz Damping coefficient= 2 MW/Hz Power= 2 MW

Q: d.c. shunt generators in parallel, ench having an armature resistance of 0.1 0, running at the same…

A:

Q: 1. Sinewave A lags sinewave B by 30°. Both have peak values of 15V. Sinewave A is the reference with…

A:

Q: 5. What is the name of 0.Cgenerator field? A. Short shunt compound generator B. Long shunt compound…

A: The field winding of the Dc generator is shown below:  There are two distinct windings hence it is…

Q: List 3 differences between how 3 phase induction motors and single phase induction motors work

A: Induction motor is a widely used machine in the industry and for commercial purposes. based on the…