Upload failed: [object Object]

Welcome to AskOrAnswerMe.com , where you can ask questions and receive answers from other user. Feel free to ask any question. Help everyone by giving best answer to the questions.

11,557 questions

10,177 answers

190 comments

4,089 users

- A 3-phase fully controlled bridge converter with free wheeling diode is fed from 400 V, 50 Hz AC source and
- separately excited dc motor controlled by chopper with a frequency of 500hz and source voltage of 230v and rated value of motor is ...
- A balanced Delta connected load supplied with 440 V 50 Hz three phase AC supply has R=10 Ohm and L=0.6 mH in is each arm. Calculate line and phase current, active power.
- A three-phase, 440 V, 50 Hz ac mains fed thyristor bridge is feeding a 440 V dc, 15 kW, 1500 rpm separately
- A 0.5 Hp, 6 pole wound rotor induction motor is excited by a 3 phase 60 Hz source. Calculate the frequency of...
- A separately excited d.c. motor fed from single phase full converter with firing angle 60° runs at 1000 r.p.m.
- A three phase diode bridge rectifier is fed from a 400 V rms, 50 Hz, three phase a.c. source. For the purely
- A separately excited dc motor is required to be controlled, from a 3-phase supply, for its operation in the first...
- A single-phase fully controlled thyristor bridge ac-dc converter is operating at a firing angle of 25 and an
- A step-down chopper, fed from a 120 volt DC source, operates a DC motor whose armature e.m.f. and
- A single-phase half-controlled rectifier is driving a separately excited dc motor. The dc motor has a back emf
- A separately excited dc motor operating in first quadrant is fed from 3-phase semi -converter free -wheeling
- A solar cell of 350 V is feeding power to an ac supply of 440 V, 50 Hz through a 3-phase fully controlled bridge
- For a balanced three phase star connected load for which line voltage is 230V and per phase resistance and reactance is 6 Ohm and 8 Ohm respectively. Calculate: 1) phase voltage 2) line current 3) power factor 4) total power absorbed
- A three-phase synchronous motor has a terminal voltage of 460 V and a terminal current of 120 A at a power factor of 0.95 lagging, synchronous reactance of 1.68 ohm and the field current is 47 A. The field to armature mutual inductance of the synchronous motor is _____________.
- A single phase fully controlled thyristor bridge ac -dc converter is operating at a firing angle of 25 degree...
- The armature resistance of a permanent magnet dc motor is 0.8 Ohm. At no load, the motor draws 1.5 A from
- A single phase 230 V/ 150 V , 1 kVA, 50 Hz transformer is supplied by 230 V AC supply. Find the full load primary and secondary current.
- The no-load speed of a single-phase SCR bridge converter fed separately excited dc motor operating at a
- The stator of a 415V, 50 Hz, 4-pole slip ring Induction Motor is excited by rated frequency with slip rings open
- A 220 V dc machine has an armature resistance o f 1-ohm. If the full load current is 20A, the difference...
- The starting torque of a V/f controlled inverter-fed 3-phase induction motor operating at 25 Hz as compared
- A single-phase, 230 V, 50 Hz ac mains fed step down transformer (4:1) is supplying power to a half-wave
- A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms
- An 8-pole alternator runs at 750 rpm and supplies power to a 6-pole induction motor which has a full load
- When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a
- The primary winding of a 220/6 V, 50 Hz transformer is energised from 110 V, 60 Hz supply. The secondary
- The primary winding of a 220/6 V, 50 Hz transformer is energised from 110 V, 60 Hz supply. The secondary ...
- A separately excited d.c. machine is coupled to a 50 Hz, three-phase, 4-pole induction machine as shown in
- In a three phase controlled bridge rectifier with an increase of overlap angles the output dc voltage
- Consider the circuit in Fig. 2 with the following data: VBE=0.6V; Vz=6.6V; Re=2K ohm; Vcc=15V; assume IB <<IC. What is the role of R1 resistor? Calculate the current IC through the collector resistor (RC): what can be the variation range of the load resistance Re for the current Ic to remain constant.
- A 1-phase, 7.46 kW motor is supplied from a 400 V, 50 Hz A.C mains. Its efficiency is 85% and power factor is ...
- What is the slip (as a percentage) when a 6 pole single phase induction motor operating on 220 V and 60 Hz is
- A 400 V, 50 Hz three-phase induction motor rotates at 1440 rpm on full -load. The motor is wound for
- A single phase transformer is designed to operate from 50 Hz, 1100 V supply and to have an output voltage
- A separately excited dc generator is running at rated speed and at no load. If its field winding is suddenly...
- A dc shunt motor runs at 500 r.p.m at 220 V. A resistance of 4.5 Ω is added in series with the armature for...
- The number of poles in a phase induction motor at 50 Hz and running at 1500 rpm will be?
- A 3 phase, 400 volts, 50 Hz, 100 kW, 4 pole squirrel cage induction motor with a rated slip of 2% will have a...
- An R-L series AC circuit has R = 10 ohm and XL = 10 ohm. It is connected to an AC voltage source, the phase
- if voltage is 230 Volts , frequency is 50 Hz and current is 1 ampere then what will be the resistance?
- The synchronous speed of an 8 pole induction motor supplied power from a 50 Hz source will be ?
- A DC shunt motor having unsaturated magnetic circuit runs at 1000 rpm with rated voltage If the applied ...
- An AC supply of 230 V is applied to half wave rectifier circuit. A transformer turns ratio is 20 : 1. Find i) Output DC voltage (ii) Peak Inverse Voltage (PIV)
- A 750 Hp, 250 V, 1200 r/min DC motor is connected to a 208 V, 3 phase, 60 Hz, line using a 3 phase bridge...
- A large dc motor is required to control the speed of the blower from a 3 -phase ac source. The suitable ac to ...
- A DC Motor develops a torque of 150 N-m. A 10 percent reduction in the field flux causes a 50 percent
- The supply both to field and armature circuits are disconnected simultaneously in a separately excited dc...
- A 50 Hz, 3—phase induction motor has a full load speed of 1440 rpm. The number of poles of the motor is: ...
- In a separately excited generator supplying rated load the armature reaction?

...