The direction of rotation of a DC motor is changed by reversing the O brush position O supply polarity field and armature connections O field or armature connections

Q: The current drawn by a 120 V dc motor with back emf of 110 V and armature :resistance of 0.4 ohms is…

A:

Q: hotors a) What power is developed by a motor that turns at 1200 rpm and has a torque of 3.0 N-m?

A: Referring to question, the given information are: Speed of motor (s)=1200rpm. Torque (Ts)=3.0N-m.

Q: In an induction motor, if the supply voltage is above normal then the machine will operate with High…

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

Q: 6. The motion in DC motor can be increased by the following factors... (yc may choose more than one)…

A:

Q: A small series-wound dc motor is operated from a 12-V car battery. Under a normal load, the motor…

A: The circuit diagram for the series motor is given as  now according to the first condition , under…

Q: The counter e.m.f. of a d.c. motor often exceeds the supply voltage aids the applied voltage helps…

A: a..>> The back emf of a dc motor makes the motor to draw as much armature current as it is…

Q: A Series Motor has an Armature Resistance of 0.2 and a Series Field Resistance of 0.3 ohm. It is…

A: Need to find back EMF of motor

Q: The resistance of each of the two coil of a series motor is 0.04 ohm, armature resistance 0.04 ohm.…

A:

Q: the relation between armature and field currents in a series connected DC motor is O It = If + la O…

A:

Q: series motors has a very high starting torque because its armature resistance is small O True O…

A: Given  A true or false question based on series DC motor. Please find the answer below

Q: The dc motor has maximum current at start because:

A: In DC Motor, rotating armature in the magnetic field develops an EMF which always acts against the…

Q: A 230v DC series motor takes 30A when giving its rated output at 1400 rpm. It has a field resistance…

A:

Q: The factors effecting the speed of dc motor are The flux p and the voltage across the armature The…

A: The factor affecting the speed of the dc motor is as follows; N=V-Ia RaϕN= speed of dc…

Q: Appliances in home that use DC motor and briefly explain why it works as reverse DC generator

A: => Dc motor are commonly used in the household appliances Like -: vacuum cleaner, food mixer…

Q: The back emf of a dc motor

A: The explanation is as follows.

Q: The DC shunt generator with the terminal voltage 350 V, armature drop 7 V and the each brush drop 2…

A:

Q: series motor runs at 800rpm when the voltage is 400v and the current is 25 ampere the armature…

A:

Q: 1. The operation of Commutator in DC Motor is O a) to convert dc to ac O b) to convert ac to dc O c)…

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Q: The shunt DC generator gives almost O Constant current O None of these O Constant voltage O Constant…

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Q: Problem 3: Design a PWM to control a servo motor based on the data given in Table 2 Angle -60 0 +60…

A: PWM refers to pulse width modulation is a term used to describe an digital signal. An PWM signal can…

Q: The stationary windings or magnets of a DC motor are called the

A: In the DC motor, there are stationary windings are also called magnet of the DC motor.

Q: The DC shunt generator with the terminal voltage 300 V, armature drop 7 V and the each brush drop 4…

A: In this we will find emf..

Q: Q- The armature resistance of a permanent magnet dc motor is 0.80. At no load, the motor draws 1.5 A…

A:

Q: A 220 V shunt motor has an armature resistance of 0.5 ohm and takes a current of 40 A on full-loads.…

A: The solution for given shunt motor can be achieved as follows.

Q: Give two ways you can reverse the direction of a basic dc motor? O a) Reverse the current ) b) Keep…

A: The explanation of the given problem is as follows.

Q: A dc series motor has an armature resistance of 0.06 Q and series field resistance of 0.08 Q. The…

A: As two questions are different so iam solving only one question i.e 1st question. take ratio of back…

Q: 9. Which type of motor is most widely used as servomotor today? a) induction motor b) DC brush motor…

A: We need to select correct option for servomotor .

Q: 250 v ,4pole wavw wound DC series motor has 782 conductors on its armature and series field…

A: Terminal voltage is given, VL=250 V Number of poles P = 4 Number of conductors Z = 782 Field…

Q: The DC shunt generator with the terminal voltage 375 V, armature drop 7 V and the each brush drop 2…

A:

Q: A 3-phase 440 V, 50 Hz induction motor has 4% slip. The frequency of rotor current  a. 48 Hz  b. 2…

A: Given, 3-phase 440 V induction motor Frequency f=50 Hz Slip s=4%=0.04

Q: The DC shunt generator with the terminal voltage 375 V, armature drop 8 V and the each brush drop 2…

A: Generator: It is an electromechanical device, that converts the mechanical energy to electrical…

Q: The DC shunt generator with the terminal voltage 375 V, armature drop 6 V and the each brush drop 4…

A: In this question , we will find generated emf in dc machine.

Winding and Constructions

Alternating Current (AC) winding is generally of the 3-phase type due to the inherent advantages of the 3-phase machine. Armature coils must be connected to the yield balance (equivalent in magnitude and 2/3 of the series phase difference of the rod) 3-phase electromotive forces (emf). The armature should be divided into step-bands to start with slots around the perimeter.In the construction of AC machines, the frame is used as an external protective shield to protect it from environmental conditions. The frame also serves as the outer perimeter, allowing the interior to be easily placed. The static state section of the devices is the stator winding attached stator.