As the torque on synchronous motor increases, the motor speed O a reduces O b. remains constant Oc increases

Q: In an induction motor, if the rotor is locked, then the rotor frequency of induction motor will be:…

A: Given: In an induction motor, the rotor is locked.

Q: Which motor cannot be started on no load none of the above O shunt motors O series motors O…

A: Given: The motor cannot be started on no load is determined as, None of the above Shunt motors…

Q: A 3-phase, 50 Hz induction motor has 8 poles. If the full load slip is 2.5 per cent, determine (a)…

A: Given: 3-phase induction motor having Frequency, f=50 Hz Number of poles, P=8 Slip, s=2.5%=0.025

Q: A three phase synchronous motor requires dc supply for the magnetic field. Select one: O True O…

A: The three phase synchronous motor is not a self starting motor.  Hence it requires a DC supply which…

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

A: An energy meter is shown below:

Q: 208 Volt, 10 HP, single pole number 4, 60 Hz, star- connected asynchronous motor, full load slip…

A: Given data, Supply voltage V = 208 V. Number of poles P = 4. Frequency f = 60 Hz. Output power…

Q: The O smaller O larger the number of poles used in a stepper motor, the better the resolution

A: here we have to give relation between the number of poles and resolution.

Q: P1. Determine the number of poles, the slip, and the frequency of the rotor currents at the rated…

A:

Q: block diagram fro dc motor refrigerator

A: Electrical machines can be either generator, transformer or motors. They can be either Ac machines…

Q: A synchronous machine is generating power of 2.6 MW, If the machine can deliver a maximum power of…

A: Power delivered by synchronous machine =(maximum power it can deliver) ×sin(power angle). Given…

Q: A 4 pole 50Hz induction motor operates witha rotor speed of 1440 rpm. The percentage slip is

A: Given : Pole= 4  f=50 HZ  Nr=1440 rpm

Q: The frequency of emf in the stator of a 4 pole induction motor is 50Hz and the rotor emf frequency…

A: The rotor emf frequency is directly proportional to the supply frequency and slip. It is…

Q: An 8 pole alternator runs at 750 rpm. It supplies power to 6 pole induction motor, which has full…

A: Given: Number of pole, P1 = 8 Alternator speed, Ns1 = 750 rpm Number of pole, P2 = 6 Full load slip,…

Q: The synchronous speed of a four-pole induction motor operating at 50Hz is A 25 rps B C D 40 rps 35…

A: Given Data:-Pole=P=4frequency=f=50Hz

Q: A synchronous machine is generating power of 2.6 MW, If the machine can deliver a maximum power of…

A: Given: P=2.6 MWPem=3.7 MW

Q: A voltmeter gives 120 oscillations per minute when connected to the rotor. The stator frequency is…

A: Given that voltmeter gives 120 oscillation per minute when connected with rotor. Given stator…

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: A centre zero ammeter connected in the rotor circuit of a 6-pole 50 Hz induction motor makes 30…

A: Given- 6-pole 50 Hz induction motor, No. of poles p=6, frequency f=50 Hz, 30 oscillations in 1…

Q: A20 The speed at which the magnetic field of a 3-phase induction motor rotates is called the

A:

Q: The motor which can be used to perform low performance requiring applications is synchronous drive…

A: The motor can be used to perform low Performance requiring application is?

Q: Synchronous speed of an induction motor is defined as O speed of an induction motor at no load speed…

A: Definition of synchronous speed speed of the revolution of the magnetic field in the stator winding…

Q: An eight-pole wound rotor induction motor operating on a 60 Hz supply is driven at 1800 rpm by a…

A: Given induction motor having, Number of poles, P = 8 Frequency, f = 60 Hz Rotor speed, Nr = 1800 rpm

Q: Due to an armature reaction in DC mach the generated volt is O Decrease O Increase or decrease O…

A: In this we will write about generated voltage in dc machine due to armature reaction...

Q: At start the slip of an induction motor is equal to O 0.75 00 O 0.5

A: At starting the rotor speed of induction motor is zero. Nr=0 Let a induction motor with synchronous…

Q: The voltage at induction motor rotor oscillates 180 times per minute. The stator frequency is 60 Hz.…

A: Given, Rotor oscillates 180 times per minute. Rotor frequency, f'=18060=3 Hz. Stator frequency, f=60…

Q: A 3-phase 440 V, 50 Hz induction motor has 5% slip. The frequency of rotor current will be

A: For induction motor frequency of rotor current at any slip is slip times supply frequency. Given…

Q: The low speed variation in salient pole synchronous machine is due to LONG AXIAL LENGTH UNEVEN FLUX…

A: we have to choose the correct reason of the given question.

Q: An induction motor runs at 3510 rpm. Calculate the percent slip

A: Consider the number of poles in which the induction motor is available are 2, 4 and 8

Q: A dc series motor is running at rated speed without any additional resistance in series if an…

A: When dc series motor is running at a rated speed without any external resistance. If resistance is…

Q: generate in the case of O Small resistance O Existence of frequency Absence of residual flux O High…

A:

Q: Due to the presence of two rotating magnetic fields force the three phase induction motor is self s…

A: Whenever a 3phase balanaced supply is given to 3phase balanced winding of a stator of a 3phase…

Q: hase induction motor is (A) Stationary (C) Rotating

A: Generally the stator the motor contains of overlapping offset by an angle of 120° .

Single Phase Induction Motor

The single-phase induction motor or engine consists of a single rotating phase in the stator and a rotating cage in the rotor. When phase one supply is connected to the stator winding, a magnetic field is generated. In the pulsating field, the rotor does not rotate due to inertia. So, a single-phase import motor does not start and requires some initial methods.