In single phase energy meter, is placed at the edge of Aluminum disc, which controls the speed of the disc. O series magnet O brake magnet O shunt magnet O M type magnet

Q: Question-4 For each of the following main parts that make up the alternator (1 to 4), choose the…

A: As per guidelines I am solving first question only.

Q: 13. A permanent magnet motor has the ability to generate to a variety of magnetic fields True False

A: A permanent magnet motor is a type of motor that uses magnetic in the field along with the windings.

Q: In an induction motor running, if the direction of the rotating field is changed by swapping the two…

A: When we swapping any two phase of induction motor,  direction of rotating magnetic field get reverse…

Q: A manganin swamp resistance is connected in series with a moving coil ammeter consisting of a milli-…

A: A manganin swamp resistance is connected in series with a moving coil ammeter consisting of a milli-…

Q: Compare between squirrel cage rotor and solid iron rotor

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Q: A circular magnetron has inner radius = 0.15 m and outer radius magnetic flux density is 1 2x10:3 m?…

A: We are given that:Inner radius (a) = 0.15 mOuter radius (b) = 0.45 mMagnetic flux density To Find:…

Q: a) Flux leakage in the airgap of a magnetic circuit is called o paermeability o fringing. o…

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Q: The speed of rotating magnetic field of 8 pole 50 Hz induction motor is?

A: Given, Frequency, f = 50 Hz. The number of pole, P =8

Q: - which of the following 3-phase motors has a wire wound rotor a- polyphase induction motor…

A: 1. Polyphase induction motor consists of wire wound rotor and slip rings. Hence option b is the…

Q: i need  theory about Characteristic of Separately excited Generator

A: To write the characteristics of separately excited Generator

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: A thermocouple has an output e.m.f. as shown in the following table when its hot (measuring)…

A:

Q: dc compound generator

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Q: What are the following statements are true for a three-phase induction motor? I. Three-phase…

A: We need to select correct statement regarding three phase induction motor.

Q: Write a boundary condition  equation  1. Dielectric to dielectric 2. Magneto dielectric to Magneto…

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Q: block diagram fro dc motor refrigerator

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

Q: Calculate the rotor reactance per phase of an 8 pole, 50Hz, 30 induction motor which develops a…

A:

Q: In DC generator, the field flux can be decreased by

A: In the DC shunt generator,  Field flux can be control, describe the method?

Q: 7- Iron loss in the rotor of a 3-phase induction motor (a) Very low frequency of emf induced in the…

A: In this question,  We need to choose the correct options Iron losses in the rotor of the 3 phase…

Q: small 4-pole generator with a six-turn rotor coil generates the following voltage wave: e = 169.706…

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Q: 93. A 4-pole de generator runs at 1500 rpm. The frequency of current in armature winding is (a) Zero…

A: Given, Total number of pole, P = 4. Speed, N = 1500 rpm.

Q: A small 4-pole generator with a six-turn rotor coil generates the following voltage wave: e =…

A:

Q: A commutator has 456 segments. Indicate whether or not the windings are possible a. Duplex-wave,…

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Q: Why do motors have gaps or breaks throughout the rotor and commutator? It makes the motor cheaper…

A: Given  To explain why motors have gaps throughout the rotor and commutator

Q: Find the mechanical speeds in revolutions per minute of a multipole electrical machine, if the…

A: In this question,  If the frequency f= 50Hz. Find the speed N?  We know N= 120f/P

Q: The cylindrical-rotor synchronous machine * is with is with maximum air-gap along the direct axis…

A: There are two types of synchronous machine: Cylindrical rotor synchronous machine Salient pole…

Q: 3 factors which  makes the magnetic field to rotate.

A: The rotation of the magnetic field is the premise of activity of each of the 3- phase motor. The…

Q: List the four basic faults which can prevent a self excited generator to buildup voltage.

A: We can define fault as imperfection in electrical system due to which current may get deviated from…

Speed control of motor

Speed control by DC motor-speed controller is required to realize variable speed drive. Whenever a motor drives a particular load, it is called drive, and variable speed drive refers to a load requiring variable speed. All this is obtained by a DC motor speed controller.