13 In an ammeter, increasing the number of turns in the movement winding would yield None of the choices An increase in the needle scale A decrease in the strength of external magnet O A decrease in the movement current An increase in the strength of the external magnet

Q: certain laminated core has a permeability of 3,150. The length is 4.85 cm and the cross section is…

A: We need to find out reluctance .

Q: What is one of the most common analog meter movements?   Select one: A. CONCENTRIC VANE B.…

A: If

Q: 13. The main function of interpoles is to minimize and the commutator when the d.c. machine is…

A: " Since you have asked multiple questions, we will solve the first question for you. If you want an…

Q: The shaft power of a shunt motor is 7.8hp. It draws 50A from 120 V. The field winding draws 1.2 Amp.…

A:

Q: the deflection torque of ammeter is directly proportional to the current through it. If a current 10…

A: To maintain deflecting torque effective in steady-state there must a controlling torque which oppose…

Q: 34A certain laminated steel core has a permeability of 3000. The lenght is 0.0729 m and…

A: Note: We are authorized to answer the single question at a time, since the exact one wasn’t…

Q: Torque is ______. Select one: A. STRENGTH THAT A MOTOR PRODUCES BY TURNING B. ROTATING MOTION C. A…

A: Torque is the twisting force that tends to cause rotation. It is the measure of how much a force…

Q: a student is testing out different ways of making a hydroelectric.  This machine uses moving water…

A: Hydro electricity- The generation of electricity from the water movement is called as…

Q: 10. A potential difference of 250 V is applied to a field winding at 15-C and the current is 5 A.…

A: First Calculate the resistance of winding at 15°C: R15=2505R15=50 Ω Now Calculate the resistance of…

Q: what is the flux leaving at 1cm

A: Brief description: For the above given question we need to calculate the value of total flux at the…

Q: 9. When you're taking a PM motor apart you should exercise special care not to damage the A. brush…

A: The solution is given below.  The brush holder is taken into special car during operation of PM.

Q: A weight of a 3.5g is used as the controlling weight in a gravity controlled instrument. Find its…

A: Given values are -

Q: Indicate the functional elements of the following measuring devices shown in Figure (6 Marks)…

A: A bourdon tube pressure gauge is a mechanical pressure gauge that does not require any electrical…

Q: Look carefully at the figure and answer the following questions. For your answers choose between on…

A: There will be the concept of Lenz's law. Because Faraday's first law i.e., tells us that if you will…

Q: 1. Draw in graph paper the relationship between the speed (5) and Torque(la).

A: As per our policy i have attempted only one question 1. The relation between speed and torque is…

Q: Electric flux is the amount of flux passing through a defined area that is to the direction of the…

A: Electric flux is the amount of the flux passing through a defined area that is proportional to the…

Q: on motor has a resistance of 0.012per hat must be the value of resistance per What is the percentage…

A: This is basic problem from induction motor

Q: (1) What is the armature current IA for EA= (A-10)V (2) What is new value of EAnew, at C/5 percent…

A: RA=0.25Ω ;VT=A=436 V ;EA1=A-10=426V ;1 IA1=?  for  EA=A-10 C=7, ∴C/5=7/5=1.4% decrease ∴ϕ2=0.986ϕ1 2…

Q: 47. Flux linkage is equal to:  a.   Product of number of turns and magnetic flux  b.   Number of…

A:

Q: Problem 5. The flux density between two plates separated by mica of relative permittivity 5 is 2…

A: ∇V is the voltage gradient.

Q: When a magnetic circuit is saturated, explain two solutions that can be used so that the magnetic…

A: Magnetic saturation: When the current in a coil is increased, the magnetic field also strengthened.…

Q: Problem 5. The flux density between two plates separated by mica of relative permittivity 5 is…

A: Flux density is givenD=2μC/m2  Relative permittivity is given as, ε=5 Permittivity of free space is…

Q: A 120 V motor draws 12 A when running at 3200 RPM. When the motor armature is momentarily stopped…

A: We need to find out the resistance of armature.

Q: QUESTION 5 All magnets have O flux lines O a magnetic field O north and south poles O all the above

A: Magnet : A magnetic is a metallic device which has two poles that are north and south pole like pole…

Q: In an ammeter, The deflecting torque is proportional to the current passing through it, and the…

A: Given, In an ammeter, The deflecting torque is proportional to the current passing through it, τd∝I…

Q: A bar magnet with a 1 inch square cross section is said to have a total magnetic flux of 500…

A: Given, Total magnetic flux = 500 Maxwell Cross-section area = 1inch * 1inch

Q: A 300 V Series motor draws a current of 50 A. The field resistance is 40 m ohm and the armature…

A: Given :Vin=300 VIin=50 AField resistance, Rse=40 mΩArmature resistance, Ra=0.2 Ω

Q: In a 4 pole lap wound DC Machine has 720 conductors, the number of parallel paths is on Windows bui…

A: - There are two types of winding configuration in DC Machine namely; Lap wound and wave wound. Given…

Q: 5. If number of poles = 4, number of armature slots = 12. The pole pitch %3D 6. In 5 above we will…

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

Q: Q4\ A\ If you know that the square of the current passing through an ammeter is proportional direct…

A:

Q: If you have a wire carrying current that can freely move in a magnetic field you could make a a.…

A:

Q: A 2 cm long coil has 10 turns and carries a current of 750 mA. The magnetizing force of the coil is…

A: Given, Length of coil, L = 2 cm Number of turns, N = 10 turns Current, I = 750 mA

Q: Find the pull exerted on the plunger of an electromagnet when the total flux is 300 uWb. The…

A: According to question we have to Find the pull exerted on the plunger of an electromagnet

Q: A 4-pole, D C machine has 144 slots in the armature with two coil-si slot, each coil has two turns.…

A:

Q: In the relay, what is the main purpose of the cc Generates the magnetic field Reduce the voltage C…

A: Relays acts as sensing devices in power system which detects faults in power system.

Q: A certain laminated core has a permeability of 2,500. The length is 5.5 cm and the cross section is…

A: In this question we will find reluctance of certain laminated core with given permeability ,length…

Q: Analyze the magnetic circuit of the following figure and obtain the magnetic flux in the branches of…

A: The current flowing through the left-most coil is determined as: IL=100 V10 Ω=10 A The MMF produced…

Q: For P pole machine relation between electrical degrees and mechanical degrees is * Option 5 O…

A:

Q: 15. The field winding of d.c. motor connected across 230-V supply takes 1.15 A at room temp. of…

A:

Q: In the drilling process shown in Figure 1, there are three cylinders in which cylinders A and B are…

A: In the drilling process given in above problem figure.1, there are three cylinders in which…

Q: Question 3-4 For the magnetic circuit in the figure calculate: d) e) B in the da branch Air gap B )…

A: Given for the cast steel,lab=lcd=0.25mlg=lbc=0.25×10-3mlda=0.2mldea=0.35mN=200A=2×10-2m2

Q: Q) A pointer of an instrument once deflection returns zero position, when the current is removed due…

A: In this question,  Choose the correct option A pointer of an instrument once deflection returns zero…

Q: pole in the electric motor (electromagnet) if it loses its magnetic field How to recharge the

A: A magnet is used to create the magnetic field. it may be an electromagnet or a permanent magnet,…

Q: The armature of a 60 Hz ac generator rotates in a 0.45 T B-field. The area of the coils is 0.06 m2.…

A: The solution is given below

Q: Assume a motor dissipetes 12 W internally when it delivers 50 W to a load. What is the efficimcy

A: Motor is dissipating 12W of power internally when it delivers 50W. Hence, it is represented as:

Q: (b) A coil of insulated wire of 500 turns and of resistance 5 is closely wound on an iron ring. The…

A: Given, N=500R=5 ΩD=0.5 mA=600 mm2V=6 Vμr=560

Q: A 120 V motor draws 12 A when running at 3200 RPM. When the motor armature is momentarily stopped…

A: Given: V=120 VIa=12 AN=3200 rpmWhen armature stopped, Ia'=30 A

Q: The magnetic force acts on the wire 3 +5 cm- 20 A 4 5 A 10 cm 2 cm

A: In this question,  Magnetic force act on the wire 3?

Stator and Rotor Magnetic Field

The stator and rotor magnetic field is the resulting magnetic field generated by a system of coils that are symmetrically aligned. They are supplied with polyphase currents. The magnetic field is generated by poly-phase (two or more phases) current or single-phase current. In the latter case, two field stator windings are supplied and two resulting electromagnetic fields are generated beyond the stage.